All language subtitles for Earth.Odyssey.With.Dylan.Dreyer.S04E23.1080p.WEB.h264-DiRT_track3_[eng]

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NARRATOR: WHEN YOU SEE THIS
SYMBOL, YOU KNOW YOU'RE WATCHING

TELEVISION THAT IS EDUCATIONAL
AND INFORMATIONAL.

THE MORE YOU KNOW ON NBC.

DYLAN: HI, EVERYBODY, I'M DYLAN
DREYER.

WELCOME TO "EARTH ODYSSEY".

TODAY, WE DIVE INTO THE
UNBELIEVABLE UNDERWATER WORLDS

OF THE ANIMAL KINGDOM.

WE'LL DISCOVER WHY THESE
HUMPBACK WHALES ARE TAKING A

BUBBLE BATH.

PLUS, THESE DOLPHINS MUDDY UP
THE WATER TO HUNT THEIR PREY.

AND LATER, WE DISCOVER WHAT'S
SKIMMING ACROSS THE SURFACE OF

ONE OF THE WORLD'S LARGEST
MANMADE LAKES.

BUT FIRST, YOU WON'T BELIEVE THE
SIZE OF THESE ANCIENT

AQUATIC ANIMALS.

[MUSIC]

DYLAN: OCEANS COVER MORE THAN
70 PERCENT OF THE EARTH'S

SURFACE, BUT HUMANS HAVE
EXPLORED LESS THAN FIVE PERCENT.

THE VASTNESS AND DEPTHS OF OUR
OCEANS MAKE IT ALL BUT

IMPOSSIBLE TO SEE EVERYTHING.

HOWEVER, WHAT WE HAVE EXPLORED
REVEALS AN UNPARALLELED

DIVERSITY OF LIFE, EVEN IN
PLACES YOU'D LEAST EXPECT, LIKE

OUR FIRST STOP, EGYPT, WHERE A
HIDDEN UNDERWATER EUTOPIA IS

TEEMING WITH LIFE.

THE OCEAN.

FULL OF WISDOM, WONDER, AND YOU
GUESSED IT, WATER.

IT'S ESTIMATED THAT MORE THAN
300 QUINTILLION GALLONS OF WATER

ARE ON PLANET EARTH.

AND IN EVERY REGION, THERE ARE
MYTHS, CREATURES, AND EVEN

TRADITIONS THAT TAKE PLACE IN
THESE UNDERWATER WORLDS.

LIKE IN ANCIENT EGYPT, WHERE
THEY OFFERED EELS TO ATUM,

THE CREATOR GOD.

THEIR MUMMIFIED REMAINS WERE
THEN BURIED IN BRONZE BOXES.

GIANT MORAY EELS CAN GROW TO
ABOUT NINE FEET LONG.

THIS OPENING AND CLOSING OF THE
MOUTH ENSURES A STEADY FLOW OF

WATER ACROSS ITS GILLS.

MORAYS USUALLY HUNT AT NIGHT,
USING THEIR EXCELLENT SENSE OF

SMELL TO TRACK DOWN AND AMBUSH
PREY.

[MUSIC]

DYLAN: GARDEN EELS LIVE IN
COLONIES OF UP TO

1,000 INDIVIDUALS.

GROWING UP TO MORE THAN A FOOT
LONG, THEY FEED ON PLANKTON AND

ANY SMALL FISH THAT HAPPEN TO
PASS BY.

USING THEIR TAILS, THEY BURROW
INTO THE SEABED.

THIS BECOMES THE PERMANENT HOME
WHICH THEY NEVER LEAVE.

AS WELL AS PROVIDING A SOLID
ANCHOR, THESE HOLES PROVIDE THE

PERFECT RETREAT FROM PREDATORS.

THIS GIANT ACTUALLY POSES NO
THREAT TO GARDEN EELS.

WHALE SHARKS ARE THE LARGEST
FISH IN THE WORLD.

THEY CAN GROW MORE THAN 40 FEET
LONG AND WEIGH UP TO

41,000 POUNDS.

THIS IS ABOUT THE SIZE OF A
SCHOOL BUS AND THE WEIGHT OF

MORE THAN FIVE AFRICAN
ELEPHANTS.

ON AVERAGE, WHALE SHARKS LIVE TO
BE 70 YEARS OLD, BUT SOME HAVE

BEEN KNOWN TO BE WELL OVER 100.

THEY ARE A DOCILE SPECIES AND
EVEN ALLOW SMALLER SWIMMERS TO

HITCH A RIDE ON THEIR BACKS.

BUT THAT DOESN'T MEAN THEY DON'T
POSE A THREAT TO SOME ANIMALS.

DWARFING EVERYTHING IN THEIR
WAY, THEY SURVIVE ON SOME OF THE

SMALLEST ORGANISMS IN THE OCEAN.

THEY CAN SIFT MORE THAN 1,500
GALLONS OF WATER AN HOUR.

FINE FILTERS, ALSO KNOWN AS GILL
RAKERS, TRAP ANY ORGANISM OVER

TWO MILLIMETERS WIDE.

IN ORDER TO EAT, THEY WILL OPEN
THEIR MOUTHS, JUT OUT THEIR

JAWS, AND USE 20 FILTER PADS TO
REMOVE THEIR FOOD FROM THE

WATER.

THIS TECHNIQUE IS CALLED
CROSSFLOW FILTRATION, AND IT'S

ALSO SEEN IN OTHER AQUATIC
ANIMALS, LIKE THE BALEEN WHALE.

MOST SPECIES OF SHARK WAVE THEIR
TAILS TO PROPEL THEMSELVES.

HOWEVER, WHALE SHARKS ARE UNIQUE
IN MOVING THEIR ENTIRE BODIES

FROM SIDE TO SIDE.

THEY REMAIN CLOSE TO THE SURFACE
AND THEIR TOP SPEED IS A MODEST

THREE MILES PER HOUR.

BUT DESPITE THEIR SLOW SPEED,
THESE FISH ARE MASTER MIGRATORS.

THEY WILL TRAVEL FOR MILES TO
WARMER WATERS,

WHERE PLANKTON ARE BOUNTIFUL.

WITH THEIR PASSIVE NATURE AND
REMITTED SELF-DEFENSE

MECHANISMS, WHALE SHARKS ARE A
TRUE TESTAMENT TO THE POWER THAT

SIZE CAN HAVE IN THE WILD.

COMING UP, THESE MANTA RAYS
CAN'T HELP BUT MAKE FRIENDS

WHEREVER THEY GO.

AND LATER, WE HEAD TO LAKE
NASSER, HOME TO ONE OF THE

PLANET'S LARGEST AND MOST
DANGEROUS PREDATORS.

BUT FIRST, WE DIVE RIGHT IN TO
DOLPHIN DINNERTIME.

ALL OF THIS AND MUCH MORE COMING
UP ON "EARTH ODYSSEY".

[MUSIC]

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: HERE IN FLORIDA, THESE
DOLPHINS HAVE USED THEIR VAST

INTELLIGENCE TO DEVISE A NEW WAY
OF CATCHING FISH.

TAKING UP A POSITION DOWNSTREAM,
ONE OF THE DOLPHINS USES HER

TAIL TO WHIP UP A WALL OF SILT
FROM THE SEABED.

THE OTHER DOLPHINS ARE WAITING
PATIENTLY, UNABLE TO SEE THROUGH

THE MUDDIED WATER, THE FISH ARE
FORCED TO GO OVER IT.

STRAIGHT INTO THE PATH OF THE
WAITING DOLPHINS.

[MUSIC]

DYLAN: IT'S AN INGENIOUS
TECHNIQUE, LIKELY PASSED DOWN

THROUGH GENERATIONS.

TAUGHT BY THE ADULTS TO THEIR
OFFSPRING.

[MUSIC]

DYLAN: THIS ADVANCED LEVEL OF
PROBLEM-SOLVING AND TEAMWORK

CLEARLY DEMONSTRATE THE
DOLPHIN'S INCREDIBLE

INTELLIGENCE AND THE DESIRE TO
MAKE HUNTING MORE EFFICIENT IS A

TRADEMARK OF ANY ANIMAL'S
BRAINPOWER.

WHEN IT COMES TO EFFICIENT,
COORDINATED HUNTING, DOLPHINS

AREN'T THE ONLY MARINE MAMMALS
THAT HAVE DEVISED AN INGENIOUS

METHOD TO CORRAL THEIR PREY.

HUMPBACK WHALES ARE BIG AND THEY
ARE ALSO CLEVER.

IN FACT, THE WAY THEY HUNT TAKES
ANIMAL INTELLIGENCE

TO THE NEXT LEVEL.

DESPITE WEIGHING UP TO 40 TONS,
HUMPBACKS ONLY EAT KRILL AND

SMALL FISH.

IN ORDER TO CATCH ENOUGH PREY,
THESE HIGHLY INTELLIGENT WHALES

HAVE DEVELOPED A UNIQUE HUNTING
METHOD CALLED BUBBLE NETTING.

FOR THE BUBBLE NET TO WORK, THE
WHALES MUST USE HIGHLY DETAILED

VOCALIZATIONS TO COORDINATE THE
ENTIRE POD.

ONCE A SHOAL IS LOCATED, THE
LEAD WHALE DIVES DEEP BELOW THE

FISH AND THEN EXHALES.

DRIVING THE SHOAL TOWARDS THE
SURFACE.

THEN WORKING AS A TEAM, THE REST
OF THE POD SURROUNDS THE SHOAL.

BLOWING BUBBLES AND SOUNDING
LOUD CALLS TO DISORIENT THE

FISH.

THIS WALL OF SOUND AND BUBBLES
PREVENTS THE FISH FROM ESCAPING.

ONCE THE BUBBLE NET IS IN PLACE,
THE WHALES THEN DIVE, SURGING UP

FROM BELOW.

THEIR ENORMOUS JAWS ENGULFING
THE HELPLESS FISH.

[MUSIC]

DYLAN: USING THEIR INTELLIGENCE
AND COMPLEX LANGUAGE, THESE

WHALES WILL FEAST LIKE THIS ALL
SUMMER LONG.

[MUSIC]

DYLAN: BEFORE RETURNING TO THE
WARMER EQUATORIAL WATERS,

TO BREED AND GIVE BIRTH TO THE
NEXT GENERATION.

COMING UP, WE HEAD TO AFRICA TO
SEE AN ANCIENT EGYPTIAN.

THE NILE CROCODILE.

PLUS, THESE MAJESTICAL GIANT
RAYS DO A DANCE IN THE DEEP,

COMING UP ON "EARTH ODYSSEY".

[MUSIC]

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: THE NILE CROCODILE IS
ONE OF THE MOST INFAMOUS

REPTILES IN THE WORLD.

AT THE TOP OF THE AFRICAN
AQUATIC FOOD CHAIN, IT HAS ONE

OF THE STRONGEST BITES IN THE
ANIMAL KINGDOM.

AND WHILE IT'S EASY FOR US TO BE
IN AWE OF THE STRENGTH OF THEIR

JAW, IT'S THE REASON WHY THEIR
PREY SHOULD STAY AWAY.

WHICH CAN BE TOUGH TO DO IF
YOU'RE A FISH THAT LIVES IN THE

BELLY OF THE BEAST, LAKE NASSER.

TAKE A LOOK.

ALTHOUGH THE RIVER NILE HAS
OFFERED A LIFELINE TO EGYPT'S

RESIDENTS FOR THOUSANDS OF
YEARS, A MORE RECENT FEATURE HAS

BECOME A HAVEN FOR THE REGION'S
ABUNDANT WILDLIFE.

AT ALMOST 350 MILES LONG AND
MORE THAN 20 MILES WIDE, LAKE

NASSER IS ONE OF THE LARGEST
MANMADE LAKES IN THE WORLD.

AROUND 50 YEARS AGO, THE RIVER
NILE WAS DAMMED TO CREATE THIS

ENORMOUS RESERVOIR.

THIS BROUGHT MEND TO THE
OFTEN-UNPREDICTABLE FLOOD LEVELS

FURTHER DOWNSTREAM.

ANCIENT EGYPTIANS BELIEVED THE
ANNUAL DELUGE OF FAST-FLOWING

WATER WAS A GIFT FROM THE GODS.

THEY HAD NO IDEA ITS ORIGIN LIES
ALMOST 2,000 MILES

FARTHER SOUTH.

APPROXIMATELY 90 PERCENT OF THE
NILE'S WATER ORIGINATES FROM THE

ETHIOPIAN HIGHLANDS, WHICH
RECEIVE ABOUT

SIX AND A HALF FEET OF RAIN EACH
YEAR.

IT'S ALONG THESE TINY
TRIBUTARIES THAT FERTILE SOILS

ARE WASHED DOWNSTREAM, BEFORE
ENTERING THE LONGEST RIVER ON

THE PLANET.

TODAY, THE DAMMING OF THE NILE
PREVENTS THE SILK-RICH WATER

FROM TRAVELING FARTHER
DOWNSTREAM.

INSTEAD, LAKE NASSER AND ITS
WILDLIFE BENEFIT FROM THE FOUR

MILLION TONS OF SEDIMENT
DEPOSITED HERE EACH YEAR.

ONE CREATURE BENEFITS FROM LAKE
NASSER'S SHORELINE

MORE THAN MOST.

NILE CROCODILES DON'T REACH
MATURITY UNTIL AROUND

TEN YEARS OLD.

THIS FEMALE'S RELATIONSHIP WITH
A MALE TWO MONTHS AGO

WAS A SUCCESS.

THE LAKE'S SANDY SHORE IS
PERFECT FOR EXCAVATING HER NEST.

[MUSIC]

DYLAN: AFTER REACHING AROUND A
FOOT AND A HALF DEEP,

SHE STARTS TO LAY.

APPROXIMATELY 50 EGGS ARE
DEPOSITED INTO THE

NESTING CHAMBER.

FINALLY, THEY'RE COVERED WITH
SAND.

IT'LL BE THREE MONTHS UNTIL HER
YOUNGSTERS ARE READY TO HATCH.

UNTIL THEN, SHE'LL REMAIN CLOSE,
FIERCELY GUARDING THE SITE.

COMING UP, DINNER WITH FRIENDS.

THESE GIANTS TRULY KNOW HOW TO
PICK WHO TO HANG OUT WITH.

[MUSIC]

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: THE ZANZIBAR ISLAND
CHAIN OFF THE COAST OF AFRICA

HIDES MANY UNDERWATER GIANTS.

AND OF THE 400 OR SO SPECIES OF
RAY, THE MANTA IS THE LARGEST.

THESE ALIEN-LOOKING CREATURES
CAN GROW UP TO AN INCREDIBLE

22 FEET ACROSS AND WEIGH AS MUCH
AS 4,000 POUNDS.

THEY LEAD SOLITARY LIVES AND
ONLY COME TOGETHER IN LARGE

NUMBERS UNDER CERTAIN
CONDITIONS.

THESE MANTA RAYS HAVE TRAVELED
FAR TO THIS SECTION OF REEF FOR

A SPECIAL SERVICE.

THIS CLEANING STATION PROVIDES
THE OPPORTUNITY FOR

A GOOD ONCE OVER FROM ATTENTIVE
CLEANER FISH.

FLASHES OF BLUE AND YELLOW
ADVERTISE THEIR PRESENCE.

THE CLIENTS HAPPILY FLOOD IN.

BUT BEFORE THE MANTA RAYS TAKE
UP THIS SERVICE, THEY NEED TO

FORM A LINE.

INDIVIDUALS SIZE ONE ANOTHER UP
BY SWIMMING PARALLEL TO THE

REEF.

ONCE A HIERARCHY IS ESTABLISHED,
THEY TAKE TURNS SWOOPING INTO

THE STATION.

EACH SPECIES OF CLEANER FISH
NIBBLES A DIFFERENT SECTION TO

REDUCE COMPETITION.

THIS MUTUALLY BENEFICIAL
RELATIONSHIP PROVIDES THE FISH

WITH A STEADY SUPPLY OF FOOD AND
ENSURES THE MANTA'S SKIN IS FREE

OF DEAD CELLS AND PARASITES.

CLEANING SESSIONS CAN LAST UP TO
THREE HOURS AND ONCE THOROUGHLY

SCRUBBED, THE MANTA RAYS HEAD
BACK INTO THE DEEP.

UNLIKE MANY OF THEIR SHARK
COUSINS, THESE GRACEFUL GIANTS

POSE NO THREAT TO OTHER FISH.

MANTA RAYS ARE FILTER FEEDERS
AND WHEN PLANKTON BLOOMS,

EVERYONE JOINS THE FEEDING
FRENZY.

FILTERING LARGE VOLUMES OF
WATER, THEY FUNNEL THESE

MINIATURE PREY INTO THEIR GAPING
MOUTHS.

A SINGLE MANTA CAN CONSUME UP TO
37 POUNDS OF PLANKTON A DAY.

[MUSIC]

DYLAN: THESE GIANTS THAT SWIM
IN THE OCEAN GIVE ZANZIBAR THE

WILD CHARACTER THAT MAKES IT ONE
OF THE MOST INTERESTING AND

BEAUTIFUL PLACES ON EARTH.

WE'RE SO GLAD YOU COULD COME
ALONG FOR AN ADVENTURE BENEATH

THE WAVES TO SEE SOME OF EARTH'S
MOST AMAZING AQUATIC ANIMALS.

THESE UNDERWATER WORLDS ARE HOME
TO SO MANY ANIMAL SPECIES THAT

HAVE LEARNED TO THRIVE WHERE
IT'S WET AND WILD.

THANKS FOR JOINING US AND WE'LL
SEE YOU ON THE NEXT EPISODE OF

"EARTH ODYSSEY".

[MUSIC]