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It covers more
than one third of our planet.
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00:00:14,333 --> 00:00:17,375
More than all off the continents combined.
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00:00:17,375 --> 00:00:21,500
For 200 million years,
it has teemed with life,
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00:00:21,500 --> 00:00:23,001
built new species.
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00:00:29,500 --> 00:00:32,250
It's moods power weather systems.
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00:00:33,125 --> 00:00:35,875
Touching every creature on Earth.
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00:01:15,333 --> 00:01:17,583
Leviathans are on the move.
10
00:01:18,959 --> 00:01:23,125
Grey whales headed south,
hugging the coast of California.
11
00:01:27,417 --> 00:01:30,959
They left their feeding grounds
in the arctic two months ago
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00:01:30,959 --> 00:01:33,542
and will swim nearly non
stop until they reach
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00:01:33,542 --> 00:01:35,041
their destination.
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00:01:37,291 --> 00:01:40,500
The grey whale has the
longest mammal migration know,
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00:01:40,500 --> 00:01:43,001
a 10 to 12,000 mile round trip
16
00:01:46,792 --> 00:01:48,625
and it's all for this.
17
00:01:49,625 --> 00:01:52,667
Three massive lagoons on
the west coast of Mexico's
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00:01:52,667 --> 00:01:53,875
Baja peninsula.
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00:01:58,001 --> 00:02:01,583
The first whales begin
arriving in January.
20
00:02:04,208 --> 00:02:06,667
Pregnant females who
conceived here last year
21
00:02:06,667 --> 00:02:09,001
have returned to give birth.
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00:02:10,083 --> 00:02:13,166
The other adults are looking to mate.
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00:02:18,166 --> 00:02:21,333
At 16 miles long and four miles wide,
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00:02:21,333 --> 00:02:24,959
San Ignacio Lagoon is the
last untouched whale nursery
25
00:02:24,959 --> 00:02:25,792
on Earth.
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00:02:28,875 --> 00:02:32,250
Connected to the Pacific
by a narrow sandy channel,
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00:02:32,250 --> 00:02:34,834
it is an ecosystem unto itself.
28
00:02:36,792 --> 00:02:39,792
Ocean currents infuse
these waters with food
29
00:02:39,792 --> 00:02:41,875
and visitors from the deep.
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00:02:41,875 --> 00:02:44,291
Each with in it's own season.
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00:02:50,792 --> 00:02:52,959
Swarms of migrating squid feasted
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00:02:52,959 --> 00:02:55,291
on by juvenile great whites.
33
00:02:57,959 --> 00:03:02,125
Four of the worlds seven
marine turtles feed here.
34
00:03:06,208 --> 00:03:10,375
Pristine mangroves host
nesting birds in late fall.
35
00:03:22,166 --> 00:03:23,834
The tidal cycle is critical to the health
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00:03:23,834 --> 00:03:25,667
of this ecosystem.
37
00:03:25,667 --> 00:03:28,500
Down to the smallest invertebrate.
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00:03:30,166 --> 00:03:33,500
Retreating waters flush the lagoon clean.
39
00:03:33,500 --> 00:03:37,667
Decaying matter is carried off
into the ocean for recycling.
40
00:03:43,542 --> 00:03:47,709
The incoming tide brings
nutrients and oxygen rich water.
41
00:04:01,583 --> 00:04:05,750
The evergreen mangroves are
hard at work 24 hours a day.
42
00:04:13,625 --> 00:04:16,542
An endless labyrinth of
loops anchored in the sand,
43
00:04:16,542 --> 00:04:20,709
buffers the salt marsh against
hurricanes and storm surge.
44
00:04:21,959 --> 00:04:26,001
Down here, hundreds of
species find shelter.
45
00:04:26,001 --> 00:04:30,166
Crabs, fish eggs, and hatchlings
thrive in the shadows.
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00:04:34,083 --> 00:04:36,917
At least 70% of the worlds tropical fish
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00:04:36,917 --> 00:04:41,083
need mangroves like these
for part of their life cycle.
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00:04:49,959 --> 00:04:53,959
The lagoons bounty also
draws airborne visitors.
49
00:04:58,166 --> 00:04:59,001
Osprey.
50
00:05:09,750 --> 00:05:13,125
These powerful raptors will
build a nest on nearly anything
51
00:05:13,125 --> 00:05:17,041
to keep their young up
and away from predators.
52
00:05:18,208 --> 00:05:21,875
The roof of an old
outhouse works just fine.
53
00:05:23,917 --> 00:05:26,083
Adults hunt in shifts.
54
00:05:26,083 --> 00:05:30,083
Wandering crows would be
glad to snatch a chick.
55
00:05:32,667 --> 00:05:35,917
At just a month old, they can't fly yet
56
00:05:35,917 --> 00:05:39,500
but they know how to
keep their room clean.
57
00:05:52,750 --> 00:05:56,250
With a life span of 20
years, Osprey can cover more
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00:05:56,250 --> 00:06:00,417
than 150,000 miles in search
of good hunting grounds.
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00:06:06,500 --> 00:06:10,834
No one knows how or when whales
found this desert sanctuary
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00:06:10,834 --> 00:06:14,333
but it has everything a mother could want.
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00:06:18,083 --> 00:06:20,583
A muddy bottom rich with food.
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00:06:25,417 --> 00:06:28,583
Extra salty water helps newborns float
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00:06:34,500 --> 00:06:38,583
and while killer whales ambush
calves in the open ocean,
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00:06:38,583 --> 00:06:40,959
they wouldn't dare enter
a shallow lagoon teeming
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00:06:40,959 --> 00:06:42,875
with 1,000 adult greys.
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00:06:45,792 --> 00:06:47,792
Mothers swim their calves
back and forth across
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00:06:47,792 --> 00:06:49,917
the lagoon, building up their strength
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00:06:49,917 --> 00:06:53,001
and endurance for the long swim home.
69
00:07:02,166 --> 00:07:06,375
Whalers discovered Baja's
nursery lagoon in the 1850s.
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00:07:09,333 --> 00:07:12,667
Harpoon a calf and you
quickly learn what a 50 foot
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00:07:12,667 --> 00:07:15,333
40 ton mother can do to a skiff.
72
00:07:17,250 --> 00:07:20,208
It's said that one in four
whalers who worked these waters
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00:07:20,208 --> 00:07:22,041
was maimed our killed.
74
00:07:28,291 --> 00:07:30,583
The survivors had another
name for these ferociously
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00:07:30,583 --> 00:07:31,917
protective moms.
76
00:07:32,875 --> 00:07:33,792
Devil fish.
77
00:07:34,709 --> 00:07:38,875
Still, they hunted grey
whales for nearly 100 years.
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00:07:40,834 --> 00:07:45,001
The grey whale is now
protected and they seek us out.
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00:07:49,125 --> 00:07:51,333
You are about to witness
one of natures great
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00:07:51,333 --> 00:07:53,001
and grand mysteries.
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00:07:53,917 --> 00:07:57,001
A phenomenon that began in the 1970s.
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00:08:00,583 --> 00:08:04,125
It only happens in Baja's nursery lagoons.
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00:08:20,834 --> 00:08:25,375
Mother whales approach fishing
pangas with their calves.
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00:08:25,375 --> 00:08:28,250
Some even lift their newborns up.
85
00:08:28,250 --> 00:08:30,583
Eye to eye with the species
that drove these whales
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00:08:30,583 --> 00:08:32,834
to the brink of extinction.
87
00:08:41,166 --> 00:08:43,875
Some interactions last a moment.
88
00:08:43,875 --> 00:08:45,125
Others an hour.
89
00:08:46,291 --> 00:08:48,083
When they leave the
protection of the lagoons,
90
00:08:48,083 --> 00:08:49,667
the behavior stops.
91
00:09:02,125 --> 00:09:05,625
The Atlantic's grey whales
were hunted to extinction.
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00:09:05,625 --> 00:09:07,041
In the 1940s, there were
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00:09:07,041 --> 00:09:10,375
just a few hundred pacific greys left.
94
00:09:10,375 --> 00:09:12,875
Today, there are about 20,000.
95
00:09:20,625 --> 00:09:23,458
By May, the whales are
gone, swimming north back
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00:09:23,458 --> 00:09:24,625
to the Arctic.
97
00:09:39,458 --> 00:09:42,875
If this calf survives the
wild pacific, she'll be ready
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00:09:42,875 --> 00:09:45,875
for motherhood in about eight years.
99
00:10:30,250 --> 00:10:33,001
Some migrations remain a mystery.
100
00:10:40,250 --> 00:10:42,583
Very little is known about
the rare and illusive
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00:10:42,583 --> 00:10:44,709
black sea nettle.
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00:10:44,709 --> 00:10:48,875
It wasn't described and
named by science until 1997.
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00:10:50,542 --> 00:10:52,333
These jellyfish wander the Pacific
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00:10:52,333 --> 00:10:54,959
between Southern California and Baja,
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00:10:54,959 --> 00:10:58,375
eating phytoplankton and smaller jellies.
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00:10:59,917 --> 00:11:02,834
Fully grown, a black sea
nettle's bell can be three feet
107
00:11:02,834 --> 00:11:06,500
across with stinging
tentacles 25 feet long.
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00:11:08,166 --> 00:11:11,834
About every 10 years, they
appear in swarms of hundreds
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00:11:11,834 --> 00:11:14,001
then vanish into the deep.
110
00:11:22,125 --> 00:11:23,917
The Pacific ocean seems custom made
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00:11:23,917 --> 00:11:26,001
for secretive carnivores.
112
00:11:33,583 --> 00:11:36,333
Every October, great white
sharks begin gathering
113
00:11:36,333 --> 00:11:40,583
at Guadalupe Island,
off the coast of Mexico.
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00:11:50,083 --> 00:11:52,001
The males arrive first.
115
00:11:55,917 --> 00:12:00,083
At 12 to 16 feet and 2,000
pounds, they are intimidating
116
00:12:01,083 --> 00:12:04,001
but they are dwarfed by the ladies.
117
00:12:12,542 --> 00:12:17,500
Females arrive a month later
and they can be giants,
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00:12:17,500 --> 00:12:20,500
up to 20 feet long and 7,000 pounds.
119
00:12:32,875 --> 00:12:36,583
Just what they are doing
here, no one knows for sure.
120
00:12:36,583 --> 00:12:39,125
A congregation of the sexes suggest mating
121
00:12:39,125 --> 00:12:42,125
but pregnant females are here too.
122
00:12:42,125 --> 00:12:45,709
Perhaps to ambush
migrating elephant seals.
123
00:12:48,500 --> 00:12:50,875
We have five senses.
124
00:12:50,875 --> 00:12:53,500
450 million years of
evolution have equipped
125
00:12:53,500 --> 00:12:56,166
these apex predators with seven.
126
00:12:57,041 --> 00:13:01,208
But they are useless against
nets, hooks, and long lines.
127
00:13:04,250 --> 00:13:06,375
We once thought females couldn't reproduce
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00:13:06,375 --> 00:13:09,208
until they were 15 years old.
129
00:13:09,208 --> 00:13:10,375
We were wrong.
130
00:13:11,208 --> 00:13:12,792
Make that 30 years.
131
00:13:16,166 --> 00:13:20,458
The silly notion of marauding
sharks has begun to fade.
132
00:13:20,458 --> 00:13:22,959
So have many species of shark.
133
00:13:26,542 --> 00:13:30,250
We kill 100 million every year for sport,
134
00:13:30,250 --> 00:13:33,500
baseless folk medicine, even cosmetics.
135
00:13:41,834 --> 00:13:45,001
When the festivities at
Guadalupe Island wind down,
136
00:13:45,001 --> 00:13:48,500
this shark heads east
in search of sea lions.
137
00:13:48,500 --> 00:13:51,500
He knows exactly where to find them.
138
00:13:59,500 --> 00:14:01,750
Towering volcanic cliffs mark the gateway
139
00:14:01,750 --> 00:14:03,500
to the Sea of Cortez.
140
00:14:04,333 --> 00:14:08,250
A 700 mile long slice of blue
water between mainland Mexico
141
00:14:08,250 --> 00:14:10,750
and the Baja peninsula.
142
00:14:19,834 --> 00:14:22,792
This rocky finger of land
broke away from the continent
143
00:14:22,792 --> 00:14:26,959
about seven million years ago
and began sliding westward.
144
00:14:29,542 --> 00:14:31,959
Pacific waters fill the void.
145
00:14:41,917 --> 00:14:46,041
The Sea of Cortez is the most
diverse sea on the planet.
146
00:14:46,041 --> 00:14:50,208
Home to more than 5,000 species
of fish and invertebrates.
147
00:14:56,375 --> 00:15:00,001
Ever flowing tides,
southerly winds, and rising
148
00:15:00,001 --> 00:15:04,333
sun warmed water create
strong deep currents.
149
00:15:04,333 --> 00:15:09,125
A ceaseless engine powering
this unique ecosystem.
150
00:15:22,750 --> 00:15:25,750
The current pulls nutrients
from the cold depths
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00:15:25,750 --> 00:15:28,500
feeding fan corals and plankton.
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00:15:28,500 --> 00:15:30,834
The best fish food there is.
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00:15:45,959 --> 00:15:48,750
Hungry mobulas gather by the hundreds,
154
00:15:48,750 --> 00:15:51,500
gliding through the water column.
155
00:15:57,542 --> 00:16:00,959
This ancient cousin to the
shark is less than three feet
156
00:16:00,959 --> 00:16:02,291
from tip to tip.
157
00:16:07,166 --> 00:16:09,001
Unlike great whites,
which have been tracked
158
00:16:09,001 --> 00:16:11,875
by satellite for decades,
very little is know
159
00:16:11,875 --> 00:16:14,458
about mobula migration
patterns, where they mate,
160
00:16:14,458 --> 00:16:15,625
or give birth.
161
00:16:16,542 --> 00:16:19,625
But they have only one pup at a time.
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00:16:21,291 --> 00:16:22,834
Scooping up plankton en masse
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is an effective feeding strategy.
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00:16:25,417 --> 00:16:28,959
It's also dangerous to
their very survival.
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00:16:28,959 --> 00:16:31,250
A single commercial
fishing boat could decimate
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00:16:31,250 --> 00:16:33,375
this shoal in hours.
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00:16:33,375 --> 00:16:37,542
Harvesting their gill plates
and fins for distant markets.
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00:16:42,083 --> 00:16:45,917
The mobula has reached
near threatened status.
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00:16:55,542 --> 00:16:59,959
Plankton eaters come in
all shapes and sizes.
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00:16:59,959 --> 00:17:03,125
But none as more important than these.
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00:17:04,001 --> 00:17:06,667
Pound for pound, they are
probably the most nutritious
172
00:17:06,667 --> 00:17:08,792
fish in the world.
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00:17:08,792 --> 00:17:11,291
Sardine, anchovy, and herring.
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00:17:12,500 --> 00:17:14,959
The super food of the oceans.
175
00:17:17,417 --> 00:17:21,583
They feed countless carnivores,
above and below water.
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00:17:22,917 --> 00:17:25,583
Great schools course
through the Eastern Pacific
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00:17:25,583 --> 00:17:29,583
and Sea of Cortez,
migrating, feeding, spawning.
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00:17:31,750 --> 00:17:34,792
The sardine has one brief mission in life.
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00:17:34,792 --> 00:17:38,625
Reproduce before something
or someone eats it.
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00:17:40,542 --> 00:17:43,834
When the United States
went to war in 1917,
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00:17:43,834 --> 00:17:45,417
so did the sardine.
182
00:17:46,709 --> 00:17:50,417
It was the perfect food to
can, ship, and feed millions
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00:17:50,417 --> 00:17:51,417
of soldiers.
184
00:17:54,250 --> 00:17:57,959
The sardine supply and
it's uses seemed endless.
185
00:17:57,959 --> 00:18:01,375
Animal food, ingredients
for paint and explosives,
186
00:18:01,375 --> 00:18:02,208
even soap.
187
00:18:05,375 --> 00:18:08,458
Decades without fishing
regulations or self restraint
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00:18:08,458 --> 00:18:09,709
took it's toll.
189
00:18:11,792 --> 00:18:16,542
By the end of World War
2, the sardines were gone.
190
00:18:16,542 --> 00:18:18,875
A total collapse of the sardine fishery
191
00:18:18,875 --> 00:18:20,792
in the Eastern Pacific.
192
00:18:23,001 --> 00:18:25,417
It has never fully recovered.
193
00:18:29,208 --> 00:18:32,291
A single sardine is helpless
but they create safety
194
00:18:32,291 --> 00:18:33,208
in numbers.
195
00:18:36,625 --> 00:18:39,083
Disappearing into a
flashing ribbon of silver
196
00:18:39,083 --> 00:18:41,417
is an excellent way to
avoid being singled out
197
00:18:41,417 --> 00:18:42,250
and eaten.
198
00:18:44,542 --> 00:18:47,458
But not everyone is dazzled by the show.
199
00:18:47,458 --> 00:18:49,917
There's always a predator
or two that can crack
200
00:18:49,917 --> 00:18:51,083
your defenses.
201
00:19:01,792 --> 00:19:04,834
Striped marlin find a school
of sardine hiding in the deep
202
00:19:04,834 --> 00:19:06,500
and drive it upward.
203
00:19:11,166 --> 00:19:14,834
Sea lions spot the
action and join the hunt.
204
00:19:24,500 --> 00:19:27,542
The sardine are surrounded
by the fastest pinniped
205
00:19:27,542 --> 00:19:30,709
and second fastest bill fish on Earth.
206
00:19:33,875 --> 00:19:36,542
There's nowhere to run or hide.
207
00:19:39,875 --> 00:19:43,208
At 10 feet and 400
pounds, the striped marlin
208
00:19:43,208 --> 00:19:45,375
can hit 50 miles per hour.
209
00:19:52,291 --> 00:19:55,417
The sardines last hope
is to create a big ball,
210
00:19:55,417 --> 00:19:59,583
tire out their attackers,
and disappear into the rocks.
211
00:20:03,250 --> 00:20:05,709
The predators carefully
time their plunges.
212
00:20:05,709 --> 00:20:09,041
Being skewered or rammed could be fatal.
213
00:20:21,001 --> 00:20:23,834
Fish blood in the water
is like a siren song
214
00:20:23,834 --> 00:20:26,750
calling the hungry from miles away.
215
00:20:38,959 --> 00:20:41,959
Sea lions are among the
great whites favorite foods
216
00:20:41,959 --> 00:20:43,375
and they know it.
217
00:20:46,333 --> 00:20:50,458
This one seems to be just passing through.
218
00:20:50,458 --> 00:20:54,083
Still, one brave soul keeps
on eye on the interloper
219
00:20:54,083 --> 00:20:57,166
while the others dash back to safety.
220
00:21:05,875 --> 00:21:09,250
These hunters will venture
nearly 300 miles off shore
221
00:21:09,250 --> 00:21:10,750
in search of food.
222
00:21:12,001 --> 00:21:14,001
But this is their realm.
223
00:21:18,667 --> 00:21:20,417
Shallow rocky waters.
224
00:21:23,583 --> 00:21:26,875
Few creatures navigate crashing
waves and ripping currents
225
00:21:26,875 --> 00:21:29,291
like the California sea lion.
226
00:21:33,291 --> 00:21:36,792
They are indeed the king of the coastline.
227
00:21:58,291 --> 00:22:00,959
They can sprint to 25 miles per hour,
228
00:22:00,959 --> 00:22:03,959
avoiding predators or catching prey.
229
00:22:05,917 --> 00:22:10,166
Unlike their cousin, the seal,
this mammal has ear flaps,
230
00:22:10,166 --> 00:22:14,333
long front fins to walk on land,
and they are highly social.
231
00:22:25,166 --> 00:22:28,250
A colony can be 1,500 hundred strong.
232
00:22:33,667 --> 00:22:37,750
But there's no doubt who's
in charge around here.
233
00:22:39,041 --> 00:22:41,875
At seven feet and more than 800 pounds,
234
00:22:41,875 --> 00:22:45,542
this bull has 20 or so
females in his harem.
235
00:22:47,875 --> 00:22:50,709
There aren't any lazy
kings among pinnipeds
236
00:22:50,709 --> 00:22:53,875
and no one inherits anything from dad.
237
00:22:56,250 --> 00:22:59,083
A pretender to the throne
must be as big and fat
238
00:22:59,083 --> 00:23:02,083
as possible for the breeding season.
239
00:23:06,166 --> 00:23:09,291
If he can beat up and drive
off the current champion,
240
00:23:09,291 --> 00:23:11,709
the bulls job has just begun.
241
00:23:14,875 --> 00:23:17,792
He fasts, living off stored
blubber while defending
242
00:23:17,792 --> 00:23:20,875
his patch of rock from
rivals and trying to attract
243
00:23:20,875 --> 00:23:21,959
more females.
244
00:23:24,667 --> 00:23:27,291
Endless patrolling for
predators and troublemakers
245
00:23:27,291 --> 00:23:29,542
eventually takes it's toll.
246
00:23:31,792 --> 00:23:34,458
Most bulls last just a few
weeks before a rival sends
247
00:23:34,458 --> 00:23:35,458
him packing.
248
00:23:42,917 --> 00:23:46,458
Females can reach six feet and 220 pounds
249
00:23:46,458 --> 00:23:50,625
and like most parents,
there's no rest for the weary.
250
00:23:53,250 --> 00:23:56,417
Experienced moms flip upside
down to take a breath.
251
00:23:56,417 --> 00:23:59,834
Their eyes never leaving the little ones.
252
00:24:04,208 --> 00:24:08,375
Juveniles are like puppies,
full of energy and mischief.
253
00:24:11,083 --> 00:24:13,792
Anything interesting needs investigation,
254
00:24:13,792 --> 00:24:17,291
becomes a chew toy or a game of keep away.
255
00:24:27,125 --> 00:24:31,291
Antagonizing a damsel fish
is just good clean fun.
256
00:24:47,834 --> 00:24:50,834
But make no mistake, a
sea lion will let you know
257
00:24:50,834 --> 00:24:54,291
when she's had enough of your nonsense.
258
00:25:05,375 --> 00:25:08,875
For all it's acrobatic grace,
the California sea lion
259
00:25:08,875 --> 00:25:12,959
is a champion among deep
divers and built for it.
260
00:25:16,709 --> 00:25:19,166
They can collapse their
lungs and slow their hearts
261
00:25:19,166 --> 00:25:22,166
from 90 beats per minute to just 20.
262
00:25:23,001 --> 00:25:25,041
Blood is shunted away
from tissue that doesn't
263
00:25:25,041 --> 00:25:27,542
need much oxygen, so
that specialized muscles
264
00:25:27,542 --> 00:25:29,375
can grab the extra O2.
265
00:25:31,208 --> 00:25:33,709
All of this allows a sea
lion to hold it's breath
266
00:25:33,709 --> 00:25:37,375
for 15 minutes and safely dive to 900 feet
267
00:25:37,375 --> 00:25:38,959
in search of squid.
268
00:25:54,834 --> 00:25:59,001
Three dozen islands are scattered
about the Sea of Cortez.
269
00:26:01,583 --> 00:26:05,667
Most were created by
explosive volcanic activity.
270
00:26:06,500 --> 00:26:09,250
Some are tiny barren bits of rock.
271
00:26:09,250 --> 00:26:13,458
Others are large enough
to have their ecosystem
272
00:26:13,458 --> 00:26:17,250
and grow the greatest cacti on Earth.
273
00:26:17,250 --> 00:26:18,750
The mighty Cardon.
274
00:26:20,250 --> 00:26:23,542
These slow growing succulents,
or water storing plants,
275
00:26:23,542 --> 00:26:26,125
can live for hundreds of years.
276
00:26:27,875 --> 00:26:31,959
A giant can reach 60 feet
high, nine feet in diameter
277
00:26:31,959 --> 00:26:33,458
and weigh 25 tons.
278
00:26:38,875 --> 00:26:41,333
The cardon shrug off the
worst hurricanes the Pacific
279
00:26:41,333 --> 00:26:42,250
can gin up.
280
00:26:45,875 --> 00:26:48,250
They go months on end in
this desert oven without
281
00:26:48,250 --> 00:26:49,500
a drop of rain.
282
00:26:51,333 --> 00:26:53,792
But when it comes to
reproduction, this cactus
283
00:26:53,792 --> 00:26:56,041
has a problem, pollination.
284
00:26:57,917 --> 00:27:00,250
Those nodules near the top are blossoms
285
00:27:00,250 --> 00:27:03,001
but they are sealed tight.
286
00:27:03,001 --> 00:27:06,417
Opening them in the heat
of the day is a bad idea.
287
00:27:06,417 --> 00:27:10,583
Flowers get cooked and the
cactus loses precious water.
288
00:27:13,208 --> 00:27:15,625
Mother nature has a solution.
289
00:27:15,625 --> 00:27:17,959
A secret army of pollinators.
290
00:27:17,959 --> 00:27:20,041
Somewhere down there.
291
00:27:20,041 --> 00:27:22,417
Without it, the reign of the mighty cardon
292
00:27:22,417 --> 00:27:24,166
would come to an end.
293
00:27:38,917 --> 00:27:41,166
When night falls, the blossoms open,
294
00:27:41,166 --> 00:27:43,166
emitting a pungent odor.
295
00:27:53,458 --> 00:27:56,542
Hungry pallid bats emerge
from their caves and crevices
296
00:27:56,542 --> 00:27:58,375
and follow their nose.
297
00:28:01,417 --> 00:28:04,125
Other bats have evolved
long tongues to efficiently
298
00:28:04,125 --> 00:28:06,959
extract the flowers nectar.
299
00:28:06,959 --> 00:28:11,125
Not the pallid bat, but it's
the cardon's best friend.
300
00:28:13,709 --> 00:28:16,625
Working hard for every
drop of sugary liquid,
301
00:28:16,625 --> 00:28:19,875
they are coated with a layer of pollen.
302
00:28:22,001 --> 00:28:25,041
Flitting from blossom to
blossom like a furry bumblebee,
303
00:28:25,041 --> 00:28:27,542
they pollinate the cacti.
304
00:28:27,542 --> 00:28:30,166
The bats get an energy
drink and the cardon get
305
00:28:30,166 --> 00:28:31,250
to reproduce.
306
00:28:38,333 --> 00:28:40,500
Pallid bats are the size of a mouse,
307
00:28:40,500 --> 00:28:42,917
with the wing span of a crow.
308
00:28:53,458 --> 00:28:57,625
They're also well equipped
to climb, crawl, and hunt.
309
00:29:06,834 --> 00:29:09,667
Like other bats, they
use echolocation to fly
310
00:29:09,667 --> 00:29:12,458
from roosting site to hunting grounds.
311
00:29:12,458 --> 00:29:14,291
Then they fall silent.
312
00:29:17,208 --> 00:29:20,375
Extra large ears are exquisitely
designed to pin point
313
00:29:20,375 --> 00:29:24,792
the location and distance
of the slightest noise.
314
00:29:24,792 --> 00:29:28,208
Sooner or later, the prey reveals itself.
315
00:29:35,166 --> 00:29:39,333
In hand to hand combat,
the scorpion always loses.
316
00:29:45,667 --> 00:29:49,625
Some scorpion stings could
easily kill a mammal this small
317
00:29:49,625 --> 00:29:53,792
but these ambush predators
seem immune to the venom.
318
00:30:01,917 --> 00:30:06,083
A pallid bat can eat half
it's body weight in a night.
319
00:30:27,250 --> 00:30:30,667
As the night shift winds down,
a whole new set of hunters
320
00:30:30,667 --> 00:30:32,083
reports for duty.
321
00:30:38,166 --> 00:30:39,417
Common dolphin.
322
00:30:41,750 --> 00:30:44,125
They prefer shallow
coastal water where fish
323
00:30:44,125 --> 00:30:46,125
are more easily trapped.
324
00:30:57,166 --> 00:31:01,333
Small pods join together,
sometimes by the hundreds.
325
00:31:03,417 --> 00:31:07,083
Dolphin are among evolution's
great masterpieces.
326
00:31:07,083 --> 00:31:10,583
Perhaps second only to us in intelligence.
327
00:31:14,291 --> 00:31:17,166
About 55 million years ago, it's ancestor
328
00:31:17,166 --> 00:31:20,500
was a wolf like creature
land that began foraging
329
00:31:20,500 --> 00:31:22,250
in swamps and rivers.
330
00:31:25,500 --> 00:31:28,917
Eventually, nostrils moved
to the top of it's head.
331
00:31:28,917 --> 00:31:32,083
Finger like paw bones fused into fins.
332
00:31:33,083 --> 00:31:36,125
Aquatic life streamlined
and shrank it's body
333
00:31:36,125 --> 00:31:39,458
but it's brain grew by leaps and bounds.
334
00:31:43,083 --> 00:31:44,458
The dolphin, as we know it,
335
00:31:44,458 --> 00:31:47,375
emerged about 10 million years ago.
336
00:31:50,542 --> 00:31:53,083
New studies suggest
that their echolocation
337
00:31:53,083 --> 00:31:56,583
is far more complex then we ever imagined.
338
00:31:57,875 --> 00:32:00,375
The dolphins sends a
focused train of clicks
339
00:32:00,375 --> 00:32:03,625
out into the water like a flashlight beam.
340
00:32:03,625 --> 00:32:07,625
The sound bounces back in the
shape of the object struck.
341
00:32:07,625 --> 00:32:11,792
Creating a rapid series of 3D
images in the dolphin's brain.
342
00:32:13,083 --> 00:32:17,250
Even in pitch black water,
they see the world around them.
343
00:32:17,250 --> 00:32:22,125
It's as though they're watching
a 3D movie with their ears.
344
00:32:56,625 --> 00:32:59,709
Some predators prefer to go it alone.
345
00:33:02,625 --> 00:33:06,792
Cormorants have been hunting
like this for 17 million years.
346
00:33:08,083 --> 00:33:10,875
It's ancestors plied
the seas when dinosaurs
347
00:33:10,875 --> 00:33:12,208
walked the land.
348
00:33:17,125 --> 00:33:19,750
Along with dense bones
and wetable feathers,
349
00:33:19,750 --> 00:33:22,291
you might think evolution
gave it special eyes
350
00:33:22,291 --> 00:33:24,333
for hunting under water.
351
00:33:24,333 --> 00:33:25,834
Not so.
352
00:33:25,834 --> 00:33:29,792
Down here, they see no better than you do.
353
00:33:29,792 --> 00:33:32,625
What they have is great technique.
354
00:33:37,917 --> 00:33:40,291
Holding their breathe for
three minutes or more,
355
00:33:40,291 --> 00:33:43,125
cormorants can dive 150 feet down.
356
00:33:45,166 --> 00:33:47,792
They dash along the
bottom or rocky crevices,
357
00:33:47,792 --> 00:33:50,458
flush out a fish, and snatch it.
358
00:33:52,917 --> 00:33:56,542
These birds work hard for every meal.
359
00:33:56,542 --> 00:34:00,542
Others live in a penthouse
and get room service.
360
00:34:08,792 --> 00:34:10,542
Brown pelican chicks.
361
00:34:12,125 --> 00:34:14,458
For now, they're perfectly
camouflaged to match
362
00:34:14,458 --> 00:34:16,375
the guano covered rock.
363
00:34:21,166 --> 00:34:22,375
It's late morning
364
00:34:22,375 --> 00:34:26,291
and you can almost hear
their bellies growling.
365
00:34:27,458 --> 00:34:30,083
Each will consume more
than 100 pounds of fish
366
00:34:30,083 --> 00:34:33,333
before they can fly and hunt on their own.
367
00:34:33,333 --> 00:34:35,458
That's two months from now.
368
00:34:35,458 --> 00:34:38,709
Until then, mom and dad are on the job.
369
00:34:47,125 --> 00:34:49,125
The pelican may be funny looking to us
370
00:34:49,125 --> 00:34:51,709
but it's a formidable predator.
371
00:34:57,625 --> 00:35:00,709
With a wing span just shy of seven feet,
372
00:35:00,709 --> 00:35:03,001
they glide low over the water.
373
00:35:03,001 --> 00:35:05,375
A tick of aerodynamics
that rewards less work
374
00:35:05,375 --> 00:35:06,709
with more speed.
375
00:35:17,917 --> 00:35:21,208
You're looking at a true living fossil.
376
00:35:21,208 --> 00:35:25,125
Almost unchanged for the
past 30 million years.
377
00:35:29,834 --> 00:35:32,834
Evolution gave the pelican
it's stamp of approval
378
00:35:32,834 --> 00:35:36,667
when our ancestors were
fluffy little monkeys.
379
00:35:41,834 --> 00:35:46,001
This is what the pelicans
are looking for, sardine.
380
00:35:54,792 --> 00:35:58,959
Out here, a splash is a dinner
bell, everyone comes running.
381
00:36:23,291 --> 00:36:27,458
Brown pelicans plunge from as
high as 100 feet in the air.
382
00:36:31,709 --> 00:36:34,458
Just before hitting the
water, their body rotates,
383
00:36:34,458 --> 00:36:36,875
protecting their neck,
throat, and arteries
384
00:36:36,875 --> 00:36:38,458
from direct impact.
385
00:36:41,542 --> 00:36:43,834
Air sacs under the skin absorb the blow
386
00:36:43,834 --> 00:36:46,166
like a layer of bubble wrap.
387
00:36:47,291 --> 00:36:50,625
The shock wave stuns fish six feet deep.
388
00:36:55,041 --> 00:36:57,959
Their bill expands like a
balloon, scooping up three gallons
389
00:36:57,959 --> 00:36:59,709
of water and sardine.
390
00:37:05,792 --> 00:37:08,709
Everyone will eat their fill today.
391
00:37:37,625 --> 00:37:42,625
To our eye, the ocean may
look like an alien world.
392
00:37:42,625 --> 00:37:46,542
It's citizens roaming
about searching for a meal.
393
00:37:46,542 --> 00:37:47,875
A place to hide.
394
00:37:50,542 --> 00:37:54,041
But there are highways,
rest stops, land marks,
395
00:37:54,041 --> 00:37:55,375
and small towns.
396
00:38:02,750 --> 00:38:04,917
The big cities are sea mounts.
397
00:38:04,917 --> 00:38:09,083
Ancient volcanoes that don't
quit reach the surface.
398
00:38:10,250 --> 00:38:14,291
The Pacific has far more
than any other ocean.
399
00:38:14,291 --> 00:38:18,333
Some are spits of rock
a few hundred feet tall.
400
00:38:18,333 --> 00:38:21,542
Others are vast mountain ranges so massive
401
00:38:21,542 --> 00:38:23,125
that their gravitational pull
402
00:38:23,125 --> 00:38:25,250
gathers the ocean up around them
403
00:38:25,250 --> 00:38:27,625
causing a bulge on the
surface that can be measured
404
00:38:27,625 --> 00:38:28,792
by satellites.
405
00:38:35,250 --> 00:38:37,959
Sea mounts are so numerous and so large
406
00:38:37,959 --> 00:38:42,625
they comprise the single
largest habitat on Earth.
407
00:38:42,625 --> 00:38:46,125
Hot spots of life greater
than deserts, tundra,
408
00:38:46,125 --> 00:38:47,792
or tropical forests.
409
00:38:48,875 --> 00:38:52,625
They cover an area larger
than South America.
410
00:38:58,250 --> 00:39:01,458
Currents flowing across the
sea floor strike the rock
411
00:39:01,458 --> 00:39:04,208
and are pushed up to the surface.
412
00:39:05,667 --> 00:39:08,875
Nutrient rich water feeds the plankton
413
00:39:08,875 --> 00:39:10,959
and plankton feed giants.
414
00:39:29,417 --> 00:39:33,041
Fully grown, giant mantas
can be 23 feet across
415
00:39:33,041 --> 00:39:35,041
and weight 3,000 pounds.
416
00:39:38,959 --> 00:39:41,041
They have been soaring through the oceans
417
00:39:41,041 --> 00:39:43,208
for some 20 million years.
418
00:39:45,500 --> 00:39:49,667
Science has just begun to
unravel their ancient secrets.
419
00:39:52,917 --> 00:39:56,917
These mantas have the
largest brain of any fish.
420
00:39:56,917 --> 00:40:00,875
Bigger than a whale shark
ten times their size.
421
00:40:00,875 --> 00:40:05,041
A manta, like a dolphin, can
recognize itself in a mirror.
422
00:40:10,001 --> 00:40:13,583
As social animals, they
feed cooperatively.
423
00:40:16,750 --> 00:40:19,001
We once thought individuals
could be identified
424
00:40:19,001 --> 00:40:22,542
and counted by their permanent markings.
425
00:40:22,542 --> 00:40:25,166
New research indicates
that mantas can indeed
426
00:40:25,166 --> 00:40:28,083
change their colors and patterns.
427
00:40:28,083 --> 00:40:32,875
We may well be counting the
same mantas again and again.
428
00:40:32,875 --> 00:40:36,041
Greatly over estimating their numbers.
429
00:40:43,667 --> 00:40:46,417
Like all rays, the demand
for their gill plates
430
00:40:46,417 --> 00:40:47,500
has exploded.
431
00:40:48,375 --> 00:40:51,208
So has the manta hunting business.
432
00:40:53,709 --> 00:40:57,875
Females have but one pup
every two to seven years.
433
00:40:59,375 --> 00:41:03,417
The giant manta is on a
fast track to extinction.
434
00:41:20,709 --> 00:41:24,208
The Galapagos Islands
off the coast of Ecuador.
435
00:41:24,208 --> 00:41:26,542
An 8 million year old experiment cooked up
436
00:41:26,542 --> 00:41:29,959
by plate tectonics and the Pacific ocean.
437
00:41:39,001 --> 00:41:41,583
Land iguanas washed up here
about the time the islands
438
00:41:41,583 --> 00:41:42,583
were formed.
439
00:41:44,208 --> 00:41:48,375
Some went inland, others
adapted to life on shore.
440
00:41:52,041 --> 00:41:55,041
Measuring in at 28 pounds
and four feet long,
441
00:41:55,041 --> 00:41:58,542
males are three times the size of females.
442
00:42:01,166 --> 00:42:04,083
But this is what makes them unique.
443
00:42:06,792 --> 00:42:09,458
The Galapagos Marine
iguana is the worlds only
444
00:42:09,458 --> 00:42:10,875
sea going lizard.
445
00:42:15,500 --> 00:42:17,583
These agile swimmers
can hold their breathe
446
00:42:17,583 --> 00:42:19,083
for up to an hour.
447
00:42:21,375 --> 00:42:23,875
They're probably the most
dangerous looking vegetarians
448
00:42:23,875 --> 00:42:25,291
you'll ever meet.
449
00:42:27,792 --> 00:42:31,041
Buffeted by waves and currents,
the iguana grips the rock
450
00:42:31,041 --> 00:42:34,959
with it's powerful claws
and fills up on algae.
451
00:42:40,750 --> 00:42:43,250
The Galapagos sits smack on the equator
452
00:42:43,250 --> 00:42:45,750
but this is no tropical beach.
453
00:42:46,959 --> 00:42:49,792
A powerful current from
Antarctica sweeps up the coast
454
00:42:49,792 --> 00:42:54,583
of South America and
courses through the islands.
455
00:42:54,583 --> 00:42:58,750
These waters are full of
nutrients and thoroughly chilled.
456
00:43:00,001 --> 00:43:03,792
A 10 minute swim can steal one
third of a reptiles body heat
457
00:43:03,792 --> 00:43:06,208
so they only feed once a day.
458
00:43:09,500 --> 00:43:12,001
The rest of their time
is spent warming back up,
459
00:43:12,001 --> 00:43:13,500
conserving energy.
460
00:43:22,834 --> 00:43:27,001
Special nose glands clean
excess salt from their blood.
461
00:43:29,792 --> 00:43:32,667
The biggest males gather harems of females
462
00:43:32,667 --> 00:43:36,166
and that means keeping challengers at bay.
463
00:43:44,500 --> 00:43:47,250
A bobbing head is the age old warning.
464
00:43:47,250 --> 00:43:50,125
Don't make me come over there.
465
00:43:50,125 --> 00:43:52,625
But when your bluff is called,
466
00:43:54,291 --> 00:43:56,041
you go to battle.
467
00:44:30,709 --> 00:44:34,041
The only thing hurt is the losers pride.
468
00:44:45,458 --> 00:44:48,041
If iguanas are the old timers around here,
469
00:44:48,041 --> 00:44:51,250
meet the new kid on the block.
470
00:44:51,250 --> 00:44:53,667
The giant Galapagos tortoise.
471
00:45:00,709 --> 00:45:02,625
They split with the Argentine tortoise
472
00:45:02,625 --> 00:45:04,709
just 2 million years ago.
473
00:45:05,959 --> 00:45:08,625
Like the iguana, enough
washed up here to reproduce
474
00:45:08,625 --> 00:45:11,291
and evolution worked it's magic.
475
00:45:15,750 --> 00:45:19,083
It's a phenomenon called island gigantism.
476
00:45:19,083 --> 00:45:22,792
No predators, no competitors,
and unlimited food
477
00:45:22,792 --> 00:45:26,250
can quickly turn a little
guy into a monster,
478
00:45:26,250 --> 00:45:29,917
one that eats salad and
naps 16 hours a day.
479
00:45:32,291 --> 00:45:35,083
Fully grown, they can
reach five feet across
480
00:45:35,083 --> 00:45:37,166
and more than 500 pounds.
481
00:45:39,250 --> 00:45:42,208
This herbivore can survive
without food or water
482
00:45:42,208 --> 00:45:43,917
for up to a year.
483
00:45:43,917 --> 00:45:48,083
A spectacular feat of adaptation
that nearly destroyed them.
484
00:45:53,709 --> 00:45:55,959
When whalers and pirates
realized the tortoise
485
00:45:55,959 --> 00:45:58,917
could provide fresh
meat for months on end,
486
00:45:58,917 --> 00:46:02,917
the pillaging began and
continued for 200 years.
487
00:46:05,834 --> 00:46:10,001
Though they are protected
today, only 10% remain.
488
00:46:17,750 --> 00:46:20,001
Studying the curious
creatures of the Galapagos
489
00:46:20,001 --> 00:46:24,417
inspired Darwin's theory
of natural selection.
490
00:46:24,417 --> 00:46:28,500
But he only saw half
the story here on land.
491
00:46:28,500 --> 00:46:30,333
The rest is out there.
492
00:46:35,291 --> 00:46:37,542
The Galapagos islands
sit at the intersection
493
00:46:37,542 --> 00:46:40,291
of three major Pacific ocean currents.
494
00:46:40,291 --> 00:46:43,417
From the south, north, and west.
495
00:46:43,417 --> 00:46:45,458
Three streams of nutrients from the deep
496
00:46:45,458 --> 00:46:49,041
serving up a buffet of
plankton, krill, fish eggs,
497
00:46:49,041 --> 00:46:50,375
and crab larvae.
498
00:46:57,125 --> 00:47:00,792
Migrating whale sharks
gather here to feast.
499
00:47:04,709 --> 00:47:08,041
This is the largest fish
that has ever lived,
500
00:47:08,041 --> 00:47:11,458
averaging 30 feet long and 20,000 pounds.
501
00:47:13,125 --> 00:47:14,792
Some get far bigger.
502
00:47:22,001 --> 00:47:24,083
It takes a staggering amount of energy
503
00:47:24,083 --> 00:47:26,750
to power these docile creatures.
504
00:47:33,166 --> 00:47:35,001
As the shark rams through the water,
505
00:47:35,001 --> 00:47:38,001
super efficient filter pads
directed it of the gills
506
00:47:38,001 --> 00:47:42,166
as fast as it comes in,
trapping food in it's throat.
507
00:47:53,542 --> 00:47:56,250
In the right conditions,
a whale shark can consume
508
00:47:56,250 --> 00:47:58,834
three million calories in a day
509
00:48:03,208 --> 00:48:06,291
and when they find an especially
rich patch of plankton,
510
00:48:06,291 --> 00:48:09,375
they hover in place and vacuum it up.
511
00:48:15,959 --> 00:48:19,417
Like a five star hotel, the
Galapagos draws customers
512
00:48:19,417 --> 00:48:20,917
from far and wide.
513
00:48:28,709 --> 00:48:32,875
Humpback whales from the
Antarctic rendezvous here to mate.
514
00:48:36,375 --> 00:48:38,709
Sea turtles entrust
their eggs to the islands
515
00:48:38,709 --> 00:48:39,875
sandy beaches.
516
00:48:41,917 --> 00:48:45,917
And in the deep, exclusive
clubs meet in secret.
517
00:48:56,542 --> 00:48:58,500
This is one of the last places on Earth
518
00:48:58,500 --> 00:49:02,667
where the scalloped
hammerhead gathers in numbers.
519
00:49:06,458 --> 00:49:10,125
During the day, they
cruise close to shore.
520
00:49:10,125 --> 00:49:14,041
You won't see them wasting
energy chasing fish.
521
00:49:17,458 --> 00:49:21,166
These predators hunt with
state of the art technology.
522
00:49:21,166 --> 00:49:24,166
The curves on their cephalofoil,
or hammer shaped head
523
00:49:24,166 --> 00:49:26,834
give it more surface
area and more receptors
524
00:49:26,834 --> 00:49:29,166
to detect electrical fields.
525
00:49:30,001 --> 00:49:31,792
The advantage comes at night,
526
00:49:31,792 --> 00:49:34,625
when they venture into open water.
527
00:49:38,792 --> 00:49:41,417
Hammerheads navigate by
the Earths magnetic field
528
00:49:41,417 --> 00:49:43,500
and dinner comes to them.
529
00:49:47,667 --> 00:49:50,542
Under the cover of darkness,
squid rise from the depths
530
00:49:50,542 --> 00:49:51,375
to feed.
531
00:49:52,458 --> 00:49:55,875
They find an army of hammerheads in wait.
532
00:49:57,041 --> 00:49:59,750
They hone in on the
minute electrical currents
533
00:49:59,750 --> 00:50:02,583
in the squids nervous
system and capture them
534
00:50:02,583 --> 00:50:04,333
in pitch black water.
535
00:50:06,959 --> 00:50:09,583
These sharks once sat atop the food chain.
536
00:50:09,583 --> 00:50:12,834
Today, they top the poachers wish list.
537
00:50:14,291 --> 00:50:16,667
The scalloped hammerhead
disappeared from the Mediterranean
538
00:50:16,667 --> 00:50:17,750
in the 1960s.
539
00:50:19,792 --> 00:50:24,417
89% are gone from the Atlantic,
99% gone from the waters
540
00:50:24,417 --> 00:50:25,750
of South Africa.
541
00:50:28,001 --> 00:50:32,166
It takes 15 years to replace
just one poached female.
542
00:50:34,500 --> 00:50:37,458
Even those shoals, in the
Galapagos, are but a shadow
543
00:50:37,458 --> 00:50:38,875
of what once was.
544
00:50:46,250 --> 00:50:50,166
Created by shifting
continents and molten rock.
545
00:50:51,458 --> 00:50:55,625
Reaching from Asia to the
Americas, from pole to pole.
546
00:50:57,417 --> 00:51:00,291
These waters reigned
supreme before humans walked
547
00:51:00,291 --> 00:51:01,125
the Earth.
548
00:51:04,625 --> 00:51:07,959
It touches every creature in every ocean
549
00:51:10,667 --> 00:51:12,834
and sustains life on land.
550
00:51:17,709 --> 00:51:19,125
The wild Pacific.
41411
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