1 00:00:00,929 --> 00:00:04,730 What could be more dangerous than the waters off Florida than sharks? Two 2 00:00:04,730 --> 00:00:06,450 Josh. Nazi submarines. 3 00:00:08,370 --> 00:00:12,690 There were three ships that were torpedoed by the Nazis, and one of them 4 00:00:12,690 --> 00:00:13,469 still missing. 5 00:00:13,470 --> 00:00:14,490 The Norlindo. Yeah. 6 00:00:15,550 --> 00:00:20,670 Let me make sure I got this right. You want to use sharks to find a shipwreck? 7 00:00:20,850 --> 00:00:22,650 That's exactly what I want to do. 8 00:00:26,830 --> 00:00:31,570 You are going to be in the water with more sharks than you have ever seen on 9 00:00:31,570 --> 00:00:33,490 of your other dives combined together. 10 00:00:33,710 --> 00:00:34,710 There's a fall shark! 11 00:00:35,030 --> 00:00:35,829 And another! 12 00:00:35,830 --> 00:00:37,050 We need to catch a shark? 13 00:00:37,250 --> 00:00:38,310 Yeah. Sounds safe. 14 00:00:38,530 --> 00:00:39,570 It's shark camp. 15 00:00:39,810 --> 00:00:43,310 The shark is going to be showing us where these wrecks are. 16 00:00:43,820 --> 00:00:47,340 He's got it. He took it. We know where they're going and what they're seeing. 17 00:00:47,340 --> 00:00:52,800 literally bit this hook in half. Look at this structure. This thing is huge. 18 00:00:53,280 --> 00:00:55,360 Look out. He's turning this way. 19 00:00:55,920 --> 00:00:59,700 There's something in front of us. There's a wall. Oh, my God. 20 00:01:12,080 --> 00:01:13,780 Welcome to the Florida Keys. 21 00:01:14,160 --> 00:01:18,800 Sure, it looks like paradise, but beneath the surface of the Gulf of 22 00:01:18,800 --> 00:01:20,880 one of nature's fiercest hunting grounds. 23 00:01:21,900 --> 00:01:28,820 The deadly bull, tiger, and great white are among the 25 24 00:01:28,820 --> 00:01:31,220 shark species that prowl these waters. 25 00:01:31,580 --> 00:01:36,460 But for eight terrifying months at the start of World War II, sharks are 26 00:01:36,460 --> 00:01:39,840 overshadowed by a far more dangerous threat, Nazis. 27 00:01:40,910 --> 00:01:45,650 Up and down the eastern seaboard and shockingly close to U .S. shores, German 28 00:01:45,650 --> 00:01:50,470 submarines aggressively attack Allied merchant ships carrying vital supplies. 29 00:01:50,890 --> 00:01:57,570 And on May 4, 1942, the Gulf sees its first combat casualties of the war when 30 00:01:57,570 --> 00:02:00,530 Nazi U -boat torpedoes three American vessels. 31 00:02:01,110 --> 00:02:06,410 Sixty -two sailors are lost at sea. Easy pickings for hungry bull and tiger 32 00:02:06,410 --> 00:02:07,410 sharks. 33 00:02:07,610 --> 00:02:09,370 And the SS Norlindo. 34 00:02:09,770 --> 00:02:16,090 SS Joseph M. Cudahy and SS Munger T. Ball sink to the seafloor with hundreds 35 00:02:16,090 --> 00:02:20,930 thousands of gallons of oil and fuel trapped inside them. The other two ships 36 00:02:20,930 --> 00:02:25,030 have been located, but the Norlindo and her trapped fuel remain lost. 37 00:02:25,350 --> 00:02:30,230 A hull breach could be an environmental disaster, threatening essential shark 38 00:02:30,230 --> 00:02:31,670 breeding and hunting grounds. 39 00:02:31,990 --> 00:02:36,750 This is a dangerous mission with deep dives and deadly predators. 40 00:02:37,440 --> 00:02:42,060 But I'm joining eminent shark behaviorist Dr. Tristan Guttridge to 41 00:02:42,060 --> 00:02:47,180 the missing tanker, to reveal a lost story from World War II, and to protect 42 00:02:47,180 --> 00:02:48,900 sharks of the Florida Keys. 43 00:02:52,560 --> 00:02:56,680 The past is all around us. Oh, this is crazy. 44 00:02:57,300 --> 00:02:59,120 A world of mystery. 45 00:02:59,360 --> 00:03:00,720 This is a plane. Yeah. 46 00:03:01,360 --> 00:03:02,360 Danger. 47 00:03:02,920 --> 00:03:04,400 We are about to be underwater. 48 00:03:06,730 --> 00:03:07,730 and adventure. 49 00:03:10,450 --> 00:03:17,430 I travel to 50 00:03:17,430 --> 00:03:24,330 the far corners of the Earth to uncover where legends end and history begins. 51 00:03:25,830 --> 00:03:30,910 I'm Josh Gate, and this is Expedition Unknown. 52 00:03:33,640 --> 00:03:38,240 My search for the time bomb tanker begins where the continental U .S. ends. 53 00:03:38,500 --> 00:03:44,560 I'm driving the Overseas Highway, a 113 -mile -long engineering marvel that runs 54 00:03:44,560 --> 00:03:50,880 over open ocean and connects 44 small tropical islands or keys, the very last 55 00:03:50,880 --> 00:03:53,300 which is the famously laid -back Key West. 56 00:03:56,339 --> 00:04:00,460 This vacation mecca isn't just a hot spot for parrot heads looking for a 57 00:04:00,460 --> 00:04:01,560 cheeseburger in paradise. 58 00:04:01,960 --> 00:04:05,380 It's where I've come to meet my old friend, shark expert, Dr. 59 00:04:05,580 --> 00:04:06,580 Tristan Guttridge. 60 00:04:07,160 --> 00:04:10,100 Dr. Guttridge, I presume. How are you doing, sir? 61 00:04:10,380 --> 00:04:12,420 What's up, man? Good to see you. Great to see you, buddy. 62 00:04:12,640 --> 00:04:15,680 You well? I'm really well. Last time I saw you, we were diving with Captain 63 00:04:15,680 --> 00:04:17,380 Kirk. Yeah, I know. It's surreal. 64 00:04:18,200 --> 00:04:21,500 And today, I've got one hell of an adventure for you. 65 00:04:21,740 --> 00:04:22,740 The Norlindo. 66 00:04:23,070 --> 00:04:27,990 The Norlindo, yes. There were three ships that were torpedoed by the Nazis, 67 00:04:27,990 --> 00:04:31,070 one of them is still missing, the Norlindo. So how are we going to find 68 00:04:31,070 --> 00:04:34,490 ship? We're going to do it by diving on one of the other ships that was sunk 69 00:04:34,490 --> 00:04:38,150 during that attack, the Munger T -Ball. We're going to dive on the Munger T 70 00:04:38,150 --> 00:04:42,870 -Ball. We are. Nearly 150 feet down, and we've got to go 50 miles offshore to do 71 00:04:42,870 --> 00:04:45,610 it. Well, it sounded a lot like you said 50 miles offshore. Yeah. 72 00:04:45,880 --> 00:04:49,580 50 miles. We're going 50 miles off the coast. This is going to provide that key 73 00:04:49,580 --> 00:04:52,300 clue that we'll hopefully find as the Norlindo. 74 00:04:52,520 --> 00:04:56,340 And I'm guessing because you're here, it's going to be sharky. You guessed it. 75 00:04:56,460 --> 00:05:01,260 You are going to be in the water with more sharks than you have ever seen on 76 00:05:01,260 --> 00:05:03,220 of your other dives combined together. 77 00:05:03,500 --> 00:05:08,140 No way. It is so untouched out there. It is remote. It is deep. 78 00:05:09,220 --> 00:05:10,220 It's sharky. 79 00:05:10,360 --> 00:05:12,200 Okay. Should we do it? Yep. 80 00:05:14,890 --> 00:05:19,790 Tristan is anxious to see the Munger T -Ball, or more specifically, the sharks 81 00:05:19,790 --> 00:05:24,270 that live there. It's a prospect that leaves me both excited and the exact 82 00:05:24,270 --> 00:05:25,270 opposite of excited. 83 00:05:25,930 --> 00:05:29,690 We pull away from the dock for our 50 -mile journey out to sea. 84 00:05:29,970 --> 00:05:34,830 Joining us on the mission is Dr. Corey Malcolm, an expert on the shocking 85 00:05:34,830 --> 00:05:38,550 history of how close Hitler's forces came to American shores. 86 00:05:39,030 --> 00:05:43,470 So question number one, what could be more dangerous in the waters off Florida 87 00:05:43,470 --> 00:05:44,470 than sharks? 88 00:05:44,620 --> 00:05:45,620 Two words, Josh. 89 00:05:45,860 --> 00:05:46,900 Nazi submarines. 90 00:05:47,440 --> 00:05:49,240 How bad a problem was this? 91 00:05:49,500 --> 00:05:55,400 It was a terrible problem. At the outset of World War II, the Nazis instituted 92 00:05:55,400 --> 00:05:58,040 what they called Operation Drumbeat. 93 00:05:58,420 --> 00:06:03,880 And they sent their U -boats across the Atlantic to the American coast and 94 00:06:03,880 --> 00:06:06,600 basically shot ships with impunity. 95 00:06:06,840 --> 00:06:08,180 How many ships did they take out? 96 00:06:08,780 --> 00:06:15,780 Through the first part of 1942, they took out over 600 ships. And with that, 97 00:06:15,780 --> 00:06:17,920 ,000 to 6 ,000 people were killed. 98 00:06:18,240 --> 00:06:21,940 That's more than twice as many people as Pearl Harbor. Why didn't I learn about 99 00:06:21,940 --> 00:06:22,819 this in school? 100 00:06:22,820 --> 00:06:25,900 Well, you know, honestly, people didn't know about it back then. 101 00:06:26,380 --> 00:06:30,400 These attacks were hushed up by the government at the time to prevent panic. 102 00:06:30,640 --> 00:06:35,020 After the war, they were largely forgotten, making this mission more 103 00:06:35,020 --> 00:06:36,020 than ever. 104 00:06:36,460 --> 00:06:40,400 So let's talk about this particular incident, these three ships that get 105 00:06:40,400 --> 00:06:41,400 out in this attack. 106 00:06:41,500 --> 00:06:42,500 This happens when? 107 00:06:42,800 --> 00:06:44,700 May 4th, 1942. 108 00:06:45,360 --> 00:06:48,540 That's the day the war came to the Gulf of Mexico. 109 00:06:48,820 --> 00:06:55,320 One U -boat in particular, the U -507, penetrated into the Gulf of Mexico right 110 00:06:55,320 --> 00:06:56,320 past Key West. 111 00:06:56,440 --> 00:06:57,440 Right here. 112 00:06:57,480 --> 00:07:03,800 Detailed German logs tell us that at 5 .42 in the afternoon, U -boat 507 fires 113 00:07:03,800 --> 00:07:08,820 torpedo into the stern of the SS Norlindo, which sinks in just three 114 00:07:09,140 --> 00:07:14,420 At 1 .30 a .m. on the 5th, the same sub attacks the Munger T -Ball, which 115 00:07:14,420 --> 00:07:19,480 quickly goes under. The nearby Joseph M. Cudahy sees the attack and radios it 116 00:07:19,480 --> 00:07:24,100 in. And when the Germans intercept the message, they have their final target. 117 00:07:24,510 --> 00:07:27,890 And think the Cudahy just 149 minutes later. 118 00:07:28,530 --> 00:07:31,270 Now, two of the three ships have been found, correct? 119 00:07:31,590 --> 00:07:36,450 Exactly. The Cudahy and the Munga T -Ball. You know, and these ships were 120 00:07:36,450 --> 00:07:40,610 carrying this fuel oil, which supplies them as they're traveling through the 121 00:07:40,610 --> 00:07:43,410 Gulf of Mexico. And this was trapped in their hull. 122 00:07:44,230 --> 00:07:49,510 Fortunately, the National Oceanic and Atmospheric Administration, or NOAA, is 123 00:07:49,510 --> 00:07:50,489 the case. 124 00:07:50,490 --> 00:07:56,490 In 2021, NOAA was able to extract 35 ,000 gallons of leaking oil from the 125 00:07:56,490 --> 00:08:01,370 T -Ball and are planning a similar operation on the Joseph M. Cudahy. The 126 00:08:01,370 --> 00:08:06,050 Norlindo, though, is an even bigger threat to the Gulf. It carries over a 127 00:08:06,050 --> 00:08:10,770 quarter million gallons of oil. And if it were to rupture, the resulting spill 128 00:08:10,770 --> 00:08:14,450 could be catastrophic to marine life, including sharks. 129 00:08:15,330 --> 00:08:18,270 This wreck is a ticking time bomb that needs to be found. 130 00:08:18,680 --> 00:08:22,880 So a simple question, why hasn't it been found? Why can't we find the Norlindo? 131 00:08:23,080 --> 00:08:27,100 Simple question. You would think there's an easy answer. Here you can see a 132 00:08:27,100 --> 00:08:30,540 chart showing the locations of the two known wrecks. 133 00:08:30,960 --> 00:08:35,640 Along with the known locations of the Ball and the Cudahy, the reporting on U 134 00:08:35,640 --> 00:08:41,360 -Boat 507's busy day includes data from the Nazi logs, testimony from survivors, 135 00:08:41,659 --> 00:08:45,140 and finally, records from the rescue ships that arrived later. 136 00:08:45,580 --> 00:08:49,920 Together, they give us an immense search zone of hundreds of square miles to 137 00:08:49,920 --> 00:08:50,920 find the Norlindo. 138 00:08:51,580 --> 00:08:53,320 It's all over the place. It's a lot of confusion. 139 00:08:53,720 --> 00:08:54,720 So now I see the problem. 140 00:08:55,340 --> 00:09:00,820 So we've got a wreck that's a huge threat to the environment and to sharks, 141 00:09:00,820 --> 00:09:05,260 quarter of a million gallons of fuel on board, and a story that demands to be 142 00:09:05,260 --> 00:09:07,500 remembered with a loss of life, right? Absolutely. 143 00:09:07,780 --> 00:09:09,860 You're taking us to the Munger T -Ball to start? 144 00:09:10,080 --> 00:09:11,180 That's where the hunt begins. 145 00:09:11,520 --> 00:09:12,520 All right. 146 00:09:13,949 --> 00:09:17,610 Tristan thinks he knows of some witnesses who've already been to the 147 00:09:17,610 --> 00:09:19,450 and may be able to show us the way. 148 00:09:19,710 --> 00:09:23,490 That's the good news. The bad news is that those witnesses are sharks. 149 00:09:25,490 --> 00:09:30,390 Specifically, bull sharks and tiger sharks, apex predators well over 10 feet 150 00:09:30,390 --> 00:09:32,670 long that weigh more than 1 ,000 pounds. 151 00:09:33,450 --> 00:09:37,410 To conduct the world's most dangerous interview, we take our vessel on the 152 00:09:37,410 --> 00:09:41,990 journey more than 50 miles out into open ocean, where the rest of Tristan's team 153 00:09:41,990 --> 00:09:44,910 is waiting above the wreckage of the Munger T -Ball. 154 00:09:45,850 --> 00:09:50,810 We gather for a safety briefing with Dr. Yanis Papastamatou and dive master 155 00:09:50,810 --> 00:09:51,810 Craig Jeff. 156 00:09:51,910 --> 00:09:53,930 And I take it you're going to be keeping it safe out here? 157 00:09:54,170 --> 00:09:55,410 Yes, sir. And how are we going to do that? 158 00:09:55,670 --> 00:09:58,530 So this is the Munger T -Ball wreck. 159 00:09:58,830 --> 00:10:00,810 It is a serious dive, guys. 160 00:10:01,400 --> 00:10:08,240 the depth on this dive is 140 feet this is an exceedingly remote site okay so 161 00:10:08,240 --> 00:10:12,100 a lot of the animal life a lot of the pelagic life out here will not really 162 00:10:12,100 --> 00:10:18,360 seen humans very often if at all and because they haven't seen them then they 163 00:10:18,360 --> 00:10:19,500 may be slightly more 164 00:10:20,440 --> 00:10:23,720 Inquisitive, they may be slightly more territorial, and they may be slightly 165 00:10:23,720 --> 00:10:24,539 more aggressive. 166 00:10:24,540 --> 00:10:27,540 And will they come in from the sides, from underneath? Like, what's their 167 00:10:27,540 --> 00:10:31,440 profile? They will come from 360 -degree field of attack. 168 00:10:31,740 --> 00:10:37,480 So we have to be exceedingly aware of ourselves, our surroundings, and our 169 00:10:37,640 --> 00:10:39,760 okay, at all times on this dive. 170 00:10:40,000 --> 00:10:43,560 And what's going to keep me from getting ripped to shreds down there, Tristan? 171 00:10:43,760 --> 00:10:44,760 We're going to give you a stick. 172 00:10:45,100 --> 00:10:49,560 A stick? A poker, yeah. Oh, good. That's an official term, a poker? Yeah. 173 00:10:49,850 --> 00:10:53,470 Just another form of protection. If they do get in your personal space, you can 174 00:10:53,470 --> 00:10:54,470 kind of push them off. 175 00:10:54,610 --> 00:10:56,490 Right. Also, the shark's good nature. 176 00:10:56,890 --> 00:10:57,749 Sure, yeah. 177 00:10:57,750 --> 00:10:58,750 Sharks, famous. 178 00:10:59,050 --> 00:11:00,070 Famous for their good nature. 179 00:11:00,810 --> 00:11:04,430 Great. Okay, so I got a stick and a prayer. All right. Should we get into 180 00:11:04,550 --> 00:11:06,370 Yep. Let's see what's down there. Come on. 181 00:11:07,750 --> 00:11:10,830 In addition to watching our backs, we need to watch the clock. 182 00:11:11,370 --> 00:11:15,450 When we reach the wreck at 140 feet, we'll only have a few minutes of bottom 183 00:11:15,450 --> 00:11:19,790 time before the risk of decompression sickness sets in. And at 50 miles 184 00:11:19,790 --> 00:11:23,270 offshore, timely medical attention is not an option. 185 00:11:25,070 --> 00:11:26,890 All right, heading down. Here we go. 186 00:11:28,470 --> 00:11:31,450 Visibility looks good so far. Very clear blue. 187 00:11:32,460 --> 00:11:37,560 As we drop down, we're swarmed by schools of amberjack. After more than 80 188 00:11:37,560 --> 00:11:41,700 on the otherwise featureless bottom of the Gulf, the Munger T -Ball has likely 189 00:11:41,700 --> 00:11:47,060 transformed into an artificial reef, a thriving habitat for prey like these 190 00:11:47,060 --> 00:11:49,720 and the shark predators who feed on them. 191 00:11:51,500 --> 00:11:55,460 Passing 50 feet, visibility's definitely dropping off now. 192 00:11:56,020 --> 00:11:58,420 Yeah, I can't make out the bottom of the wreck. 193 00:12:03,690 --> 00:12:04,690 There's a shark! 194 00:12:05,250 --> 00:12:06,250 Right there! 195 00:12:06,490 --> 00:12:07,490 Right there! 196 00:12:07,590 --> 00:12:08,590 Yeah, 197 00:12:09,750 --> 00:12:10,750 that's a bull shark! 198 00:12:11,410 --> 00:12:13,770 Look at that big bull shark! 199 00:12:16,810 --> 00:12:19,150 It's a top predator in this system. 200 00:12:19,370 --> 00:12:21,730 They're basically a shark that eats other sharks. 201 00:12:22,750 --> 00:12:24,810 Not something to mess with. 202 00:12:25,650 --> 00:12:31,100 Growing up to 12 feet long and weighing in at 1 ,300 pounds, Bull sharks are 203 00:12:31,100 --> 00:12:34,540 notoriously aggressive and unpredictable ambush predators. 204 00:12:34,820 --> 00:12:38,480 They literally have hundreds of inch -long, knife -edged teeth. 205 00:12:38,740 --> 00:12:40,640 But don't worry, I've got a stick. 206 00:12:42,580 --> 00:12:49,480 With a flick of his powerful tail, the 207 00:12:49,480 --> 00:12:52,820 big bull surges forward at 25 miles per hour. 208 00:13:10,180 --> 00:13:16,020 I'm off the Florida Keys diving almost 140 feet down to a wreck called the 209 00:13:16,020 --> 00:13:21,760 Munger T -Ball, a freighter sunk by a Nazi submarine in World War II. Now it's 210 00:13:21,760 --> 00:13:25,600 become an artificial reef that is a hunting ground for some of the Gulf's 211 00:13:25,600 --> 00:13:28,280 predators. That was too close. 212 00:13:28,540 --> 00:13:29,940 It was just curious. 213 00:13:30,680 --> 00:13:32,780 Fortunately, we're not on the menu today. 214 00:13:35,600 --> 00:13:40,040 The farther down we go, the shorter our clock becomes if we want to avoid the 215 00:13:40,040 --> 00:13:44,640 bends. But Tristan believes this wreck is essential to finding the lost ship, 216 00:13:44,780 --> 00:13:47,540 the Norlindo, if, that is, we ever get there. 217 00:13:49,480 --> 00:13:50,680 Is that the bottom? 218 00:13:54,000 --> 00:13:55,980 No, sir, that's a wreck. 219 00:14:14,640 --> 00:14:19,080 Bull sharks thrive in murky water, where they can sneak up on their prey. 220 00:14:19,380 --> 00:14:24,080 Using what's referred to as the bump and bite technique, they grope about for 221 00:14:24,080 --> 00:14:29,440 food in the darkness and latch on with jaws that bite at 1 ,300 pounds per 222 00:14:29,440 --> 00:14:33,200 square inch. The average nail gun uses only 130, so... 223 00:14:33,600 --> 00:14:34,600 Good luck with that. 224 00:14:34,920 --> 00:14:36,380 All right, I'm going inside. 225 00:14:37,160 --> 00:14:42,780 We're over 140 feet deep. We've only got two minutes of time at this depth 226 00:14:42,780 --> 00:14:44,120 before we have to go shallow. 227 00:14:44,640 --> 00:14:45,640 Copy that. 228 00:14:48,460 --> 00:14:51,100 It is so airy in here. 229 00:14:51,440 --> 00:14:55,480 Yeah, 30 people died in here. This is a war grate. 230 00:14:58,280 --> 00:15:01,520 I think it's time to go, guys. We're out of time. We've got to go. 231 00:15:01,780 --> 00:15:02,780 Copy that. 232 00:15:03,040 --> 00:15:06,560 As we make our way topside, we'll have to run the gauntlet again. 233 00:15:07,920 --> 00:15:09,880 More sharks out here. Look at that. 234 00:15:10,500 --> 00:15:15,700 All right, Tristan, I have to say, an amazing experience seeing this wreck. 235 00:15:16,140 --> 00:15:20,460 But the question is, how is this going to lead us to the Norlinda? 236 00:15:21,260 --> 00:15:22,980 It has to do with those sharks. 237 00:15:23,340 --> 00:15:24,880 What do you notice about them? 238 00:15:25,640 --> 00:15:29,260 Well, they're definitely circling us and circling the wreck. 239 00:15:30,040 --> 00:15:31,040 Exactly. 240 00:15:31,610 --> 00:15:36,690 These sharks know where this wreck is, and I can guarantee you they know where 241 00:15:36,690 --> 00:15:38,350 other wrecks are in the vicinity. 242 00:15:38,930 --> 00:15:44,250 So, let me make sure I got this right. You want to use sharks to find a 243 00:15:44,250 --> 00:15:47,190 shipwreck? That's exactly what I want to do. 244 00:15:48,050 --> 00:15:49,050 Okay? 245 00:15:51,310 --> 00:15:56,690 Back on the boat, Tristan tells us how we can use sharks like these as spies to 246 00:15:56,690 --> 00:15:59,650 find the Norlindo and avert an ecological disaster. 247 00:16:00,540 --> 00:16:04,140 So as you said down there, these sharks know where it is. 248 00:16:04,380 --> 00:16:08,180 Yeah, sharks use wrecks. How do they know where these wrecks are? They're not 249 00:16:08,180 --> 00:16:11,920 using Google Maps down there. Like, how do they come back to these wrecks? So we 250 00:16:11,920 --> 00:16:15,600 know that sharks can detect the Earth's geomagnetic field, and we know that a 251 00:16:15,600 --> 00:16:20,860 massive steel hull causes essentially an anomaly in that magnetic field. 252 00:16:22,380 --> 00:16:27,360 Sharks have a remarkable sense receptor organ known as ampullae of Lorenzini. 253 00:16:27,520 --> 00:16:31,980 These small mucus -filled pores are concentrated around a shark's mouth and 254 00:16:31,980 --> 00:16:37,380 snout and give them a sixth sense, the ability to detect electrical and 255 00:16:37,380 --> 00:16:42,800 fields, such as those generated by their prey or an enormous metal shipwreck. 256 00:16:43,560 --> 00:16:48,760 It's likely the shark can detect that massive ship long before they can see 257 00:16:48,800 --> 00:16:52,870 Wow. So they're able to navigate back to it, maybe use it as a waypoint. It's 258 00:16:52,870 --> 00:16:54,010 like having a built -in GPS. 259 00:16:54,370 --> 00:16:58,530 And so you think those sharks can lead us to the Norlindo? We just have to get 260 00:16:58,530 --> 00:17:01,130 them to show us where it is. How do we do that? 261 00:17:01,690 --> 00:17:05,510 We're going to use trackers, and we have two different kinds. The first one is 262 00:17:05,510 --> 00:17:09,690 an active acoustic tracker, and the second is a camera tag. A camera tag? 263 00:17:09,890 --> 00:17:11,970 Yeah, and essentially it's shark cap. 264 00:17:12,349 --> 00:17:16,010 So the shark is going to be showing us where these wrecks are. 265 00:17:16,919 --> 00:17:19,660 Amazing. So how do we get these trackers on the shark? 266 00:17:20,040 --> 00:17:22,839 We need to catch one. We need to catch a shark? 267 00:17:23,040 --> 00:17:24,079 Yeah, we need to catch one. 268 00:17:24,700 --> 00:17:26,359 All right, let's catch a shark. 269 00:17:27,280 --> 00:17:28,280 Sound safe? 270 00:17:29,560 --> 00:17:33,520 I never thought I'd say this on a Shark Week show, but to catch a shark, well, 271 00:17:33,640 --> 00:17:38,400 we're going to need a smaller boat, specifically one that's more 272 00:17:38,400 --> 00:17:41,280 that we can get close enough to place our cameras on the sharks. 273 00:17:42,980 --> 00:17:45,280 Okay, what is this? So this is a cat tag. 274 00:17:45,500 --> 00:17:48,820 What we have here is a video camera. This gives us about 10 hours of footage. 275 00:17:49,100 --> 00:17:51,060 So the sharks are going to be filming for us? 276 00:17:51,280 --> 00:17:52,119 Yes, exactly. 277 00:17:52,120 --> 00:17:53,120 Okay, amazing. 278 00:17:53,180 --> 00:17:54,560 And I'm sure they work cheaper than Brian. 279 00:17:55,240 --> 00:17:56,240 Not much. 280 00:17:56,920 --> 00:18:01,880 The tag clamps to the dorsal fin and records everything the shark sees until 281 00:18:01,880 --> 00:18:06,720 special fastener dissolves in seawater and the device detaches and floats to 282 00:18:06,720 --> 00:18:09,640 surface. So a day from now, this thing pops back up. 283 00:18:10,110 --> 00:18:13,810 And what we have here is a satellite transmitter that's going to send a 284 00:18:13,810 --> 00:18:17,470 to the satellite that gets back to us via email saying this is where the tag 285 00:18:17,950 --> 00:18:18,950 Okay. 286 00:18:19,370 --> 00:18:24,110 To find sharks, the tag near the center of our established search zone. We head 287 00:18:24,110 --> 00:18:26,530 toward a ubiquitous site in these waters. 288 00:18:26,990 --> 00:18:27,989 Shrimp boat. 289 00:18:27,990 --> 00:18:31,690 It's a great place to find sharks. You know, these guys are obviously de 290 00:18:31,690 --> 00:18:32,690 -heading the shrimp. 291 00:18:32,950 --> 00:18:36,830 So the sharks follow and eat the scraps, basically. This is the dinner bell. 292 00:18:37,030 --> 00:18:38,490 Exactly. I'll throw a few... 293 00:18:38,860 --> 00:18:41,160 Little fishes and we'll see what they do. Okay. 294 00:18:43,660 --> 00:18:44,960 Throw some bait in. 295 00:18:46,020 --> 00:18:50,140 If you've ever wondered how long it would take a hungry shark to smell you 296 00:18:50,140 --> 00:18:51,460 the water, stand by. 297 00:18:51,660 --> 00:18:52,659 What is that? 298 00:18:52,660 --> 00:18:55,780 Yeah, something's coming in now. Look at this. Wow. 299 00:18:56,520 --> 00:18:57,720 We got sharks everywhere. 300 00:18:59,500 --> 00:19:02,020 The entire surface just became alive. 301 00:19:09,420 --> 00:19:13,660 These are silky. These are silky sharks, yeah. There must be 20 of them just 302 00:19:13,660 --> 00:19:17,780 boiling up at the surface here. These juvenile silky sharks can ultimately 303 00:19:17,780 --> 00:19:19,120 as large as 8 feet. 304 00:19:19,620 --> 00:19:24,480 Named for their silky smooth skin, these sharks still have flesh -ripping, razor 305 00:19:24,480 --> 00:19:25,439 -sharp teeth. 306 00:19:25,440 --> 00:19:28,640 Fun fact, they're the most abundant shark species on Earth. 307 00:19:29,040 --> 00:19:31,440 And it looks like all of them showed up for dinner. 308 00:19:31,640 --> 00:19:34,460 I assume these sharks are a little too small for us to be putting a camera tag 309 00:19:34,460 --> 00:19:37,940 on. Yeah, these are way too small. These silkies have really small dorsal fins. 310 00:19:38,060 --> 00:19:41,180 They're not going to work. So what we want is one of these big bull sharks. 311 00:19:41,180 --> 00:19:45,340 there should be some bulls in this community here. You can see a bull down 312 00:19:45,380 --> 00:19:48,580 right at the base. Ah, look at that! There is one here. Big boy! Two of them! 313 00:19:51,660 --> 00:19:54,340 Throwing small pieces of fish got us small sharks. 314 00:19:54,620 --> 00:19:57,820 But to get the attention of one of these bulls, we need to... 315 00:19:58,680 --> 00:19:59,940 scale up our ambition. 316 00:20:00,260 --> 00:20:02,280 All right, well, we got some bait. 317 00:20:02,500 --> 00:20:04,840 Perfect. And we've got a big bull right underneath us. 318 00:20:05,300 --> 00:20:10,060 To keep the bull from taking our shark cootery board to go, the bait is 319 00:20:10,060 --> 00:20:15,060 to a carbon steel hook and two buoys called polyballs, which will let us know 320 00:20:15,060 --> 00:20:19,240 where he goes as well as tire him out. Here we go. We got a bull coming in. 321 00:20:20,220 --> 00:20:21,960 Oh, he's got it. He's on it. 322 00:20:24,420 --> 00:20:25,780 Here we go. He's off. 323 00:20:30,160 --> 00:20:32,780 You can't dive not with two barrels on them, you can't. 324 00:20:34,040 --> 00:20:35,040 Charles? 325 00:20:38,700 --> 00:20:39,700 Oh, boy. 326 00:20:41,260 --> 00:20:42,860 I think he's back for his noon feeding. 327 00:20:43,300 --> 00:20:45,020 I'll do the whole movie. I don't care. 328 00:20:45,220 --> 00:20:46,620 I'll do the whole thing, end to end. 329 00:20:48,020 --> 00:20:50,620 It takes the entire team to wrangle this shark. 330 00:20:50,840 --> 00:20:53,900 A powerful bull can rip the line right through your hand. 331 00:20:54,240 --> 00:20:55,980 Or worse, pull you under. 332 00:20:58,740 --> 00:20:59,740 Coming up. 333 00:21:00,040 --> 00:21:05,200 But when we try to bring the bull in... Spit it out? 334 00:21:05,740 --> 00:21:06,800 Shoot through, spit it out. 335 00:21:07,700 --> 00:21:10,640 Bigger hook in half. Look at that. 336 00:21:11,100 --> 00:21:14,600 He literally bit this hook in half. 337 00:21:15,200 --> 00:21:18,780 Pound for pound, the bull has the strongest bite of any shark. 338 00:21:19,180 --> 00:21:24,660 Their powerful jaws can even crush bone, or in this case, a carbon steel hook 339 00:21:24,660 --> 00:21:26,880 rated to hold 4 ,000 pounds. 340 00:21:27,560 --> 00:21:30,600 That shouldn't happen. I've never had one bite the end off like that. It's 341 00:21:30,600 --> 00:21:33,540 ridiculous. That bull shark went through that like butter. 342 00:21:33,860 --> 00:21:34,519 You got more of these? 343 00:21:34,520 --> 00:21:37,080 I've got more of those. Let's catch another one. Let's do it. Come on. 344 00:21:39,720 --> 00:21:41,060 We send out the bait. 345 00:21:41,840 --> 00:21:42,840 It's going its way. 346 00:21:43,160 --> 00:21:49,000 And in a matter of moments, an even bigger bull is on our line. 347 00:21:51,440 --> 00:21:52,440 Just let it go. 348 00:21:57,710 --> 00:21:58,750 And he's running. Here we go. 349 00:21:59,950 --> 00:22:02,850 Diving. Definitely on. Both buoys are down. 350 00:22:03,130 --> 00:22:04,130 He's going this way. 351 00:22:07,090 --> 00:22:08,150 I see him down there. 352 00:22:10,310 --> 00:22:12,370 I think we can start pulling in this shark. 353 00:22:14,250 --> 00:22:15,250 Here we go. 354 00:22:15,650 --> 00:22:16,650 That's a big shark. 355 00:22:16,870 --> 00:22:20,110 But when you're working with a creature that's more than 10 feet long and 356 00:22:20,110 --> 00:22:24,250 packing 600 pounds of pure muscle, the advantage goes to the shark. 357 00:22:28,290 --> 00:22:29,390 Okay. Here we go. 358 00:22:29,870 --> 00:22:31,890 Just keep him on the... Overboard right there. 359 00:22:33,290 --> 00:22:34,330 Ooh, the other one's with him. 360 00:22:36,210 --> 00:22:37,210 Grab the dorsal. 361 00:22:40,430 --> 00:22:41,430 I got it. 362 00:22:44,370 --> 00:22:45,370 Josh, watch out. 363 00:22:51,590 --> 00:22:52,590 Got it? 364 00:22:53,710 --> 00:22:55,650 Careful. Someone got my hand! 365 00:22:58,700 --> 00:23:02,960 In the warm waters of the Gulf of Mexico, I'm helping Tristan Guttridge 366 00:23:02,960 --> 00:23:04,760 camera to a massive bull shark. 367 00:23:04,980 --> 00:23:07,940 Why? Well, right now that's a question I'm asking myself. 368 00:23:08,360 --> 00:23:09,460 Here we go. Try again. 369 00:23:17,440 --> 00:23:18,520 I'm on the dorsal fin. 370 00:23:21,260 --> 00:23:23,060 I'm good here. I got the dorsal. 371 00:23:23,680 --> 00:23:27,860 To be this close, to be holding this creature against the boat. 372 00:23:28,440 --> 00:23:33,880 It's absolutely awe -inspiring. It is just huge, and it is just pure muscle. 373 00:23:34,920 --> 00:23:36,000 It's unbelievable. 374 00:23:36,440 --> 00:23:40,820 We're hoping to use the shark as a cameraman to locate the wreck of the SS 375 00:23:40,820 --> 00:23:45,900 Norlindo, which was sunk by a Nazi U -boat somewhere nearby in 1942. 376 00:23:46,700 --> 00:23:47,700 Okay, 377 00:23:49,340 --> 00:23:53,540 pack is on. Here we go. 378 00:23:54,200 --> 00:23:57,100 The camera is attached, but we're still at risk. 379 00:23:57,550 --> 00:24:01,750 Yanis turns the shark over and, with a few quick movements, puts it into a 380 00:24:01,750 --> 00:24:06,370 known as tonic immobility, basically a trance where, for a brief, blissful 381 00:24:06,370 --> 00:24:10,810 moment, she won't bite at our hands as we release her. Then we're safe to let 382 00:24:10,810 --> 00:24:11,810 her go. 383 00:24:11,830 --> 00:24:12,830 Ready? 384 00:24:19,070 --> 00:24:20,250 Go! Woo! 385 00:24:20,970 --> 00:24:21,970 All right. 386 00:24:22,190 --> 00:24:23,330 Norlindo, here we come. 387 00:24:27,470 --> 00:24:29,810 All right, that shark is off to make its first motion picture. 388 00:24:31,290 --> 00:24:32,290 Sharky for Daisy. 389 00:24:33,210 --> 00:24:34,610 Marty, Shark Daisy. 390 00:24:35,230 --> 00:24:36,830 Marty for Sharky. 391 00:24:37,130 --> 00:24:40,410 Steven Sharksburg. Quentin Sharkantino. It doesn't matter. I'll think of it 392 00:24:40,410 --> 00:24:42,270 later. The point is that shark's got a camera. 393 00:24:42,630 --> 00:24:44,370 Remember, that footage belongs to Discovery. 394 00:24:45,430 --> 00:24:47,550 Just don't post that footage on OnlyFans. 395 00:24:49,330 --> 00:24:50,490 All right, we got one down. 396 00:24:50,770 --> 00:24:51,950 Let's do it all over again. 397 00:24:52,680 --> 00:24:58,020 For the next few hours, we catch and place camera tags on four more sharks. 398 00:24:58,020 --> 00:24:59,520 more to go. 399 00:25:00,260 --> 00:25:04,640 Building a first -of -its -kind camera crew to locate the wreck of the 400 00:25:04,880 --> 00:25:06,020 He's got it. He took it. 401 00:25:09,240 --> 00:25:10,240 Yeah, 402 00:25:10,680 --> 00:25:11,680 go find the wreck. 403 00:25:12,180 --> 00:25:13,640 Okay, we got it. We got it. 404 00:25:14,400 --> 00:25:18,560 The bulls are out filming with the camera tag, but we won't get to see the 405 00:25:18,560 --> 00:25:19,560 results for a day. 406 00:25:20,000 --> 00:25:24,260 To actively track the shark population, though, Tristan wants to use acoustic 407 00:25:24,260 --> 00:25:29,440 tags. With acoustic tags, we can follow the sharks in real time as they move 408 00:25:29,440 --> 00:25:30,600 from wreck to wreck. 409 00:25:33,080 --> 00:25:37,860 But this requires us to tag sharks in the water and away from a feeding 410 00:25:38,040 --> 00:25:43,420 So Tristan directs us to what he refers to as a perfect wreck for sharks. It's 411 00:25:43,420 --> 00:25:44,920 not exactly what I'm expecting. 412 00:25:46,940 --> 00:25:47,940 Is that it? 413 00:25:48,120 --> 00:25:49,120 That's where we're headed. 414 00:25:50,160 --> 00:25:51,160 That's a wreck? 415 00:25:51,660 --> 00:25:52,660 In a sense. 416 00:25:55,180 --> 00:25:56,360 What is this thing? 417 00:25:57,420 --> 00:25:58,900 Decommissioned radar tower. 418 00:25:59,700 --> 00:26:05,260 Once used to relay radio signals, this tower's legs extend 100 feet down to the 419 00:26:05,260 --> 00:26:06,119 ocean floor. 420 00:26:06,120 --> 00:26:11,300 And unlike a shipwreck, this vertical reef created a shark habitat close to 421 00:26:11,300 --> 00:26:13,100 surface where we can tag them. 422 00:26:13,400 --> 00:26:17,240 However, if anything goes wrong out here, we're utterly on our own. 423 00:26:17,460 --> 00:26:19,760 Nobody comes out here to dive. We're in the middle of nowhere. 424 00:26:20,000 --> 00:26:21,360 These are going to be really wild animals. 425 00:26:21,780 --> 00:26:25,180 Stick close together, stay close to the structure, don't go too deep. 426 00:26:25,660 --> 00:26:26,479 Should we dive? 427 00:26:26,480 --> 00:26:28,140 Yeah. Let's see what's down there. 428 00:26:29,960 --> 00:26:35,020 We gear up and Tristan attaches the acoustic tag to the end of a long spear 429 00:26:35,160 --> 00:26:38,700 which he'll use to place it onto a passing shark's dorsal fin. 430 00:26:40,880 --> 00:26:41,940 As for me... 431 00:26:43,310 --> 00:26:45,630 Don't worry. I still have my pokey stick. 432 00:26:48,330 --> 00:26:49,330 Here we go. 433 00:26:52,150 --> 00:26:53,290 Visibility looks great. 434 00:26:54,270 --> 00:26:57,610 Yeah, we must have at least 30, 40 feet. Then it gets murky. 435 00:27:00,050 --> 00:27:03,250 Look at this structure. This thing is huge. 436 00:27:11,500 --> 00:27:13,320 Yeah, it's like an underwater spider. 437 00:27:14,160 --> 00:27:18,420 It's really eerie to see those legs just going down into the murk. 438 00:27:22,500 --> 00:27:25,360 This structure is abandoned, but look at it. It's alive. 439 00:27:26,200 --> 00:27:28,460 There's a bull shark. Look at that. 440 00:27:28,880 --> 00:27:29,880 And another. 441 00:27:30,260 --> 00:27:31,260 Whoa. 442 00:27:31,560 --> 00:27:37,600 I cannot believe how many sharks are all around us. I got to say, Tristan, I 443 00:27:37,600 --> 00:27:38,720 never get used to this. 444 00:27:38,960 --> 00:27:40,480 And I love this feeling. 445 00:27:40,880 --> 00:27:42,180 knowing that they're around there. 446 00:27:42,620 --> 00:27:47,640 And I'm guessing the Norlindo, wherever she is, is also covered in life. 447 00:27:47,900 --> 00:27:51,360 You can see why the sharks are hanging out here. Look at the food supply. 448 00:27:52,460 --> 00:27:55,080 We just got to keep ourselves off the menu, guys. 449 00:27:57,520 --> 00:28:00,040 So what's our strategy here to tag one of these? 450 00:28:01,060 --> 00:28:04,760 They're kind of on the periphery, but they seem to be coming in and making 451 00:28:04,760 --> 00:28:06,160 passes near the structure. 452 00:28:07,080 --> 00:28:11,140 I'm going to hide next to this structure and then pounce and take a tag shot. 453 00:28:11,800 --> 00:28:13,400 Copy that. I'll watch your back. 454 00:28:16,880 --> 00:28:21,500 While Yanis and I watch his six, Tristan moves into position with the tag. 455 00:28:23,100 --> 00:28:27,800 But we're so focused on tagging a bull that we almost miss the arrival of an 456 00:28:27,800 --> 00:28:31,140 even bigger and badder species coming right for us. 457 00:28:31,520 --> 00:28:33,700 Tristan, behind you! Tiger shark! 458 00:28:42,220 --> 00:28:44,020 That's a tiger. It's huge. 459 00:28:44,580 --> 00:28:48,680 While attempting to place a tracking tag on a bull shark circling a 460 00:28:48,680 --> 00:28:53,500 decommissioned radio tower in the Florida Keys, Tristan, Yanis, and I are 461 00:28:53,500 --> 00:28:55,740 surprised by an even deadlier predator. 462 00:28:56,420 --> 00:28:58,480 Whoa, massive tiger shark. 463 00:28:58,920 --> 00:29:01,060 I lost her. Where did she go? 464 00:29:02,200 --> 00:29:06,480 Tiger sharks are bigger than bulls and can grow up to 16 feet long. 465 00:29:06,990 --> 00:29:11,190 Known for their powerful serrated teeth, which can slice through the toughest of 466 00:29:11,190 --> 00:29:16,070 prey, they've been nicknamed the garbage can of the sea because they can and 467 00:29:16,070 --> 00:29:18,710 will eat anything, including people. 468 00:29:20,830 --> 00:29:25,610 I do not have eyes on her. She disappeared into that murky water below. 469 00:29:26,670 --> 00:29:29,770 I'm going to do another attempt. I've got to get this tag out. 470 00:29:30,190 --> 00:29:34,650 With dozens of bulls and a massive tiger shark circling just a few feet below 471 00:29:34,650 --> 00:29:37,290 us, Tristan leaves the safety of the tower. 472 00:29:37,970 --> 00:29:39,510 Okay, I'm taking my shark. 473 00:29:39,730 --> 00:29:40,730 Here we go. 474 00:29:49,150 --> 00:29:50,670 I got it! Nice. 475 00:29:52,550 --> 00:29:54,430 Beauty! Nice work, Tristan. 476 00:29:54,750 --> 00:29:56,910 Beautiful female bull shark. 477 00:29:57,290 --> 00:29:59,330 All right, tag is in. 478 00:29:59,900 --> 00:30:00,900 Mission accomplished. 479 00:30:01,500 --> 00:30:03,880 Let's hope she's coming straight to the Nerlindo. 480 00:30:04,200 --> 00:30:06,000 Let's go back to the boat. Here we go. 481 00:30:06,400 --> 00:30:07,480 Yep, heading back. 482 00:30:09,940 --> 00:30:14,340 We quickly jump back aboard the boat so we can send one of the research vessels 483 00:30:14,340 --> 00:30:17,680 off to chase and track the acoustic -tagged shark. 484 00:30:22,980 --> 00:30:26,040 The next morning, Yanis gets an important email. 485 00:30:26,620 --> 00:30:30,600 The first of our camera tags has surfaced and sent us GPS coordinates. 486 00:30:31,160 --> 00:30:35,220 Time to see if our cinematographers have found our missing tanker. 487 00:30:36,040 --> 00:30:39,240 We've got the coordinates, so we know where to head out. Okay, Johnny, we've 488 00:30:39,240 --> 00:30:44,020 some coordinates for you. Okay, it's north, 24 degrees, 55 .669. 489 00:30:44,460 --> 00:30:47,800 West, 82 degrees, 15 .996. 490 00:30:48,240 --> 00:30:49,360 How far is that from here? 491 00:30:49,620 --> 00:30:53,060 Eight and a half miles to the northwest of here. Okay, let's rock and roll. Come 492 00:30:53,060 --> 00:30:54,060 on, let's find it. 493 00:30:56,040 --> 00:30:58,600 We race off to find the first camera tag. 494 00:30:58,860 --> 00:31:03,740 As we close in on the coordinates, we flow down to home in on the tiny device 495 00:31:03,740 --> 00:31:05,620 floating in the vast ocean. 496 00:31:06,400 --> 00:31:07,840 All right, how are we going to find this thing? 497 00:31:08,160 --> 00:31:12,760 So we've got to try and pick up the radio transmitter. We can do it with 498 00:31:12,760 --> 00:31:14,040 antenna that we have here. 499 00:31:14,560 --> 00:31:16,120 You mean old TV antenna? 500 00:31:16,780 --> 00:31:20,760 It's essentially the same thing. This will detect that radio signal, and this 501 00:31:20,760 --> 00:31:24,680 will turn it into an audible ping that we can hear. So we'll turn it on. 502 00:31:26,190 --> 00:31:29,850 If this thing works, I'm going to eat my hat. This is set to a specific 503 00:31:29,850 --> 00:31:31,550 frequency all that time. 504 00:31:31,810 --> 00:31:32,749 Okay, let's do it. 505 00:31:32,750 --> 00:31:34,110 Keep your eyes peeled. Here we go. 506 00:31:35,730 --> 00:31:37,110 We follow the pings. 507 00:31:37,710 --> 00:31:39,110 Straight on, Johnny. Nice and slow. 508 00:31:40,010 --> 00:31:42,790 Carefully scanning the water for a red speck. 509 00:31:44,830 --> 00:31:45,830 You think we're close? 510 00:31:46,170 --> 00:31:47,290 Yeah, we're getting really close. 511 00:31:48,830 --> 00:31:50,310 We should be able to see it by now. 512 00:31:53,949 --> 00:31:56,590 Everybody keep your eyes open, all sides of the boat. 513 00:31:57,010 --> 00:31:58,210 It's got to be right here. 514 00:31:58,650 --> 00:32:00,050 Johnny, let's flow all the way down. 515 00:32:02,390 --> 00:32:05,210 I see it. You got it? Right there, right there. Wait, where, where, where? 516 00:32:05,670 --> 00:32:09,310 Oh, there it is. There it is. Just up starboard. Just up starboard. That's our 517 00:32:09,310 --> 00:32:11,570 tag right there. Dude, nice work. 518 00:32:11,830 --> 00:32:12,830 Tony, we find it. 519 00:32:13,230 --> 00:32:14,230 Yes. 520 00:32:14,730 --> 00:32:15,730 Woo. 521 00:32:16,630 --> 00:32:18,350 Unbelievable. Nice one. 522 00:32:18,790 --> 00:32:20,490 All right, camera number two, let's find it. 523 00:32:21,379 --> 00:32:25,340 We spend the better part of a day getting emails and chasing cameras. 524 00:32:26,200 --> 00:32:27,200 There you go, man. 525 00:32:27,640 --> 00:32:29,040 All right, tag number two. 526 00:32:33,160 --> 00:32:36,440 Oh, there it is. Yeah, there it is. Off the bow, off the bow. 527 00:32:36,740 --> 00:32:37,740 You see it? Yeah. 528 00:32:39,200 --> 00:32:40,200 Got it. 529 00:32:40,420 --> 00:32:41,420 Lucky number three. 530 00:32:41,900 --> 00:32:42,719 That's it? 531 00:32:42,720 --> 00:32:44,580 There it is, there it is. That's got to be it, right? 532 00:32:45,300 --> 00:32:46,980 Thankfully, the sea is calm. 533 00:32:47,260 --> 00:32:49,840 Otherwise, we could be chasing these all the way to Cuba. 534 00:32:57,000 --> 00:33:01,780 With all of our footage in hand, we catch up with the big boat to see what 535 00:33:01,780 --> 00:33:06,080 got from both the camera tags and the acoustically tagged shark from 536 00:33:06,520 --> 00:33:10,840 All right, so let's talk data. So we have a track here, and we're plotting a 537 00:33:10,840 --> 00:33:16,500 point every 30 minutes where that shark is. Okay. And here's what it looks like. 538 00:33:18,000 --> 00:33:20,980 And you can see that the shark is kind of following a contour. 539 00:33:21,300 --> 00:33:25,680 Yeah. Essentially not really making any moves left or right. It's kind of going 540 00:33:25,680 --> 00:33:27,100 on a fairly straight path. 541 00:33:27,380 --> 00:33:32,180 Yeah. And then it starts to mill around a certain area. Look at that. It starts 542 00:33:32,180 --> 00:33:33,200 to actually circle this. 543 00:33:33,900 --> 00:33:37,840 Right. So it's kind of like maybe it found a reef habitat that it's moving 544 00:33:37,840 --> 00:33:39,060 around and hunting. 545 00:33:39,280 --> 00:33:41,620 Or maybe it found a wreck. Or it could have found a wreck. 546 00:33:41,940 --> 00:33:45,660 Just like the way the sharks were circling around the Munger T -Ball. 547 00:33:45,660 --> 00:33:47,100 we have no idea what's in this. 548 00:33:47,320 --> 00:33:51,380 No, with the acoustic tracker, we know where the shark is, but we don't know 549 00:33:51,380 --> 00:33:52,179 what it's seeing. 550 00:33:52,180 --> 00:33:53,720 All right, so that gives us a place to look. 551 00:33:53,920 --> 00:33:55,480 Right. Now what about the camera tags? 552 00:33:55,740 --> 00:33:56,740 We have camera footage. 553 00:33:56,800 --> 00:34:00,580 Shot by sharks. Yep. Your shark camera crew works perfectly. 554 00:34:00,860 --> 00:34:02,020 Amazing. Let's see it. 555 00:34:04,120 --> 00:34:06,900 First look at self -shot shark footage. 556 00:34:07,400 --> 00:34:11,080 We're seeing what these animals do when we're not around. 557 00:34:11,500 --> 00:34:13,100 Okay, so we've got a shark here. Look at that. 558 00:34:14,179 --> 00:34:15,219 One of our sharks. 559 00:34:15,719 --> 00:34:18,020 is going up to several other ball sharks. 560 00:34:18,420 --> 00:34:21,940 So there actually, you know, clearly is sort of a group of them hanging around. 561 00:34:24,739 --> 00:34:25,900 Oh, look at that. 562 00:34:28,080 --> 00:34:29,080 Wow. 563 00:34:29,580 --> 00:34:33,820 So much action. I can't believe how many of them are just hanging out together. 564 00:34:36,400 --> 00:34:40,100 Now to the million -dollar question, the hunt for the Norlindo. Did you find 565 00:34:40,100 --> 00:34:42,159 anything in this footage that may help us with that? 566 00:34:42,360 --> 00:34:43,880 So there is something I want you to see. 567 00:34:44,230 --> 00:34:44,988 There is? 568 00:34:44,989 --> 00:34:46,290 Yeah. Come on. Okay. 569 00:34:46,570 --> 00:34:49,909 What did you find? Look in here. Okay. It's murky. 570 00:34:50,370 --> 00:34:52,630 Okay. Wait for it. It's coming up. 571 00:34:52,949 --> 00:34:53,949 Okay. 572 00:34:56,449 --> 00:34:57,450 Oh, right there. 573 00:34:57,530 --> 00:35:00,730 That is wreckage. That is definitely wreckage. Straight edge. 574 00:35:01,550 --> 00:35:05,290 The question now is, is that a piece of debris that fell off a ship, or is that 575 00:35:05,290 --> 00:35:05,988 a wreck? 576 00:35:05,990 --> 00:35:08,890 The only way we're going to find that out is to go and take a look ourselves. 577 00:35:09,230 --> 00:35:10,129 All right. 578 00:35:10,130 --> 00:35:11,130 Let's dive, yeah? 579 00:35:11,250 --> 00:35:13,230 Let's do it. Right now. Come on. Let's do it. Go. 580 00:35:15,020 --> 00:35:19,520 We take off for the target. Not only did one of the camera tags capture 581 00:35:19,520 --> 00:35:23,780 something that looks man -made, but it's in the same vicinity the acoustically 582 00:35:23,780 --> 00:35:28,600 tagged shark was circling, an area well within our search zone for the Norlindo. 583 00:35:28,680 --> 00:35:31,720 We may be zeroing in on the lost tanker. 584 00:35:32,120 --> 00:35:33,140 Let's see what's down there. 585 00:35:38,840 --> 00:35:43,560 We splash down and start heading for the bottom, our eyes wide open. 586 00:35:45,870 --> 00:35:48,350 Be careful because we know that there's sharks around. 587 00:35:48,550 --> 00:35:49,630 They brought us here. 588 00:35:50,530 --> 00:35:52,190 Absolutely. I got my eyes open. 589 00:35:54,270 --> 00:35:59,090 We don't have to wait long. The local welcome wagon quickly swims up to greet 590 00:35:59,090 --> 00:36:00,090 us. 591 00:36:00,830 --> 00:36:02,050 We've got sharks. 592 00:36:02,650 --> 00:36:03,650 One o 'clock. 593 00:36:04,030 --> 00:36:05,030 Four o 'clock. 594 00:36:05,950 --> 00:36:06,950 All o 'clock. 595 00:36:08,190 --> 00:36:10,530 Don't panic. Just keep it in front of you. 596 00:36:11,410 --> 00:36:14,230 But it's the murk below that we're most worried about. 597 00:36:14,560 --> 00:36:18,740 where bull sharks may be lurking to attack, and we wouldn't know until it 598 00:36:18,740 --> 00:36:19,618 too late. 599 00:36:19,620 --> 00:36:20,620 Need an example? 600 00:36:20,980 --> 00:36:22,720 Got a big bull coming up here. 601 00:36:23,260 --> 00:36:24,440 Man, that's a beast. 602 00:36:25,040 --> 00:36:26,540 Swimming back down, though. 603 00:36:26,920 --> 00:36:28,240 I don't see it anymore. 604 00:36:28,520 --> 00:36:29,720 He's circling around. 605 00:36:30,000 --> 00:36:31,000 Look out! 606 00:36:32,620 --> 00:36:33,620 Whoa! 607 00:36:39,380 --> 00:36:41,700 Whoa! Close, close, close. 608 00:36:42,100 --> 00:36:43,680 Big bull shark coming in. 609 00:36:44,200 --> 00:36:48,540 We're exploring a dive target more than 50 miles from Key West, Florida. 610 00:36:48,940 --> 00:36:53,580 Everyone stay together. We just saw three or four bull sharks on the 611 00:36:54,480 --> 00:36:58,520 Hopefully these bulls have led us to the wreck of the theme freighter Norlindo, 612 00:36:58,700 --> 00:37:04,580 a missing tanker torpedoed by the Nazis in 1942 that's still carrying up to a 613 00:37:04,580 --> 00:37:07,060 quarter million gallons of oil in her hold. 614 00:37:08,200 --> 00:37:11,080 Pulling up on 50 feet. We should be near the bottom. 615 00:37:12,490 --> 00:37:15,990 I can't see anything. I don't know what. Oh, wait, there it is. There's the 616 00:37:15,990 --> 00:37:17,310 bottom right there. You see it? 617 00:37:17,710 --> 00:37:19,290 Yeah, it's just sand here. 618 00:37:20,110 --> 00:37:24,030 There must be something down here. Those sharks must have been circling 619 00:37:24,030 --> 00:37:25,030 something. 620 00:37:26,050 --> 00:37:31,130 With a watchful eye on the sharks circling overhead, we fan out and scour 621 00:37:31,130 --> 00:37:32,930 bottom for traces of a wreck. 622 00:37:35,910 --> 00:37:37,670 But there's a shadow up here. 623 00:37:37,990 --> 00:37:40,450 There's something in front of us. Oh, wow. 624 00:38:11,820 --> 00:38:14,620 The wreck is hundreds of feet long, which fits. 625 00:38:14,960 --> 00:38:17,220 The Norlindo was a little over 250. 626 00:38:17,720 --> 00:38:22,660 As we work our way around the wreck, we find a gaping hole on the starboard side 627 00:38:22,660 --> 00:38:23,660 of the vessel. 628 00:38:23,700 --> 00:38:26,280 Guys, I found a way in. 629 00:38:26,880 --> 00:38:31,340 But was this damage caused by a Nazi torpedo or natural decay? 630 00:38:41,870 --> 00:38:43,210 I'm sure this is World War II. 631 00:38:44,510 --> 00:38:48,550 I don't want to run into a shark down in these close quarters or find whatever's 632 00:38:48,550 --> 00:38:50,970 left of Ben Gardner, so I leave the wreck. 633 00:38:51,710 --> 00:38:57,390 The side of the hull looks about right, but we should be seeing a bridge and a 634 00:38:57,390 --> 00:38:58,470 smokestack somewhere. 635 00:39:00,170 --> 00:39:02,550 Yeah, I can't see anything like that. 636 00:39:03,250 --> 00:39:08,450 This wreck's been down here a while, but it's just too box -shaped to be the 637 00:39:08,450 --> 00:39:09,530 Orlando, in my opinion. 638 00:39:10,010 --> 00:39:15,630 I agree. This thing doesn't look like an old steamer. It looks more like a barge 639 00:39:15,630 --> 00:39:18,130 vessel of some kind. Yeah, I think it's a barge. 640 00:39:20,730 --> 00:39:25,050 We've still got a real mystery on our hands here. I have no idea what this 641 00:39:25,050 --> 00:39:27,530 is, but I think that's a Norlindo. 642 00:39:28,350 --> 00:39:32,270 Whatever this wreck once was, it now belongs to the sharks. 643 00:39:33,550 --> 00:39:34,750 Whoa, watch your two. 644 00:39:34,990 --> 00:39:35,990 Big bull shark. 645 00:39:36,530 --> 00:39:38,530 And as uninvited guests... 646 00:39:38,780 --> 00:39:41,360 It's now time for us to make our way to the surface. 647 00:39:50,320 --> 00:39:52,480 Unbelievable. Absolutely incredible. 648 00:39:52,880 --> 00:39:58,560 Oh, what a wreck. The huge steel ship down there, not the Norlindo, really 649 00:39:58,560 --> 00:40:01,900 squared off some sort of industrial barge, I think. Yeah, it looks like a 650 00:40:01,940 --> 00:40:04,860 And I think the real headline is here, this worked. 651 00:40:05,360 --> 00:40:07,520 These sharks led us to a wreck. 652 00:40:07,960 --> 00:40:10,260 Who needs sonar when you've got sharks? That's right. 653 00:40:10,540 --> 00:40:13,340 So we've got another wreck today to add to the charts here. 654 00:40:13,820 --> 00:40:18,000 And in terms of the Norlindo, we keep looking. At some point, a shark's going 655 00:40:18,000 --> 00:40:20,960 take us right through that. That's right. More work to be done, and we're 656 00:40:20,960 --> 00:40:24,340 case. And the sharks are on the case. They are. All right. Awesome work, guys. 657 00:40:24,860 --> 00:40:25,860 Amazing job. 658 00:40:25,920 --> 00:40:26,920 Ah, incredible. 659 00:40:27,300 --> 00:40:28,640 It's a huge wreck down there. 660 00:40:28,980 --> 00:40:29,980 So cool. 661 00:40:32,650 --> 00:40:37,350 We tend to think of World War II as something that happened in Europe and on 662 00:40:37,350 --> 00:40:38,590 -flung Pacific islands. 663 00:40:39,310 --> 00:40:44,690 But a forgotten home front lies just off the coast of Florida, where Nazi 664 00:40:44,690 --> 00:40:50,610 submarines sank hundreds of ships, too quietly claiming 6 ,000 American lives. 665 00:40:52,630 --> 00:40:58,210 Eighty years later, the sea has transformed death into life, as these 666 00:40:58,210 --> 00:40:59,870 have bloomed into shark habitats. 667 00:41:00,460 --> 00:41:04,180 vital hunting and breeding grounds that are irreplaceable. 668 00:41:05,260 --> 00:41:10,060 But the rusting hulk of the Norlindo, with a quarter million gallons of fuel 669 00:41:10,060 --> 00:41:14,820 still in its hull, poses a dire threat to the species that call it home. 670 00:41:15,560 --> 00:41:20,760 And until it's found, these fragile shark populations are at risk of 671 00:41:20,760 --> 00:41:25,840 the final victims of the forgotten front from World War II in the Gulf of 672 00:41:25,840 --> 00:41:26,840 Mexico.