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The world's oceans
are full of wonder.
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An alien world
waiting to be explored.
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A place of extraordinary life forms
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with intriguing social lives...
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..and incredible intelligence.
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To reveal their secrets,
a hidden team goes undercover.
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Spy creatures.
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The most innovative
undersea robots in the world.
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They not only look like the animals
they film,
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they interact with them
as no human can.
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Equipped with hidden cameras...
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..they reveal their
astonishing lives.
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As our spies join their
undersea world,
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they shed light on some
of the mysteries of the deep.
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DEEP MURMURING
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As our spies search the ocean
for intelligent life,
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they find ways of thinking that must
be seen to be believed.
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A family of sperm whales.
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The most intelligent creatures
in the ocean.
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And owners of the largest
brains on the planet.
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These intellectual giants
show a social intelligence
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that appears similar to our own.
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To gain insights into their minds,
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a spy is sent among them.
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An autonomous submersible
programmed to follow the whales.
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At over 3m long,
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it's the same size
as a newborn whale.
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Large enough to hide
an array of cameras.
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But small enough to arouse
the maternal interest of a female.
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Her curiosity hints
at what she may be thinking.
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A desire to reach out
and make friends.
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Seen through the
camera eye of our spy.
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A meeting with a sentient mind.
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The first contact
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with an inquisitive
and questioning being.
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Our spy's hydrophones now capture
something extraordinary.
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DEEP CLICKING
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She attempts to communicate.
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CLICKING CONTINUES
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Another sign of her
social intelligence.
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She uses the same clicks
when greeting other whales.
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Her open jaw means she's
introducing herself to our spy.
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CLICKING SLOWS
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HIGHT PITCHED WHOOPING
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CLICKING ACCELERATES
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Waiting in the wings is a calf.
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In a touching sign of approval,
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she invites the youngster
to meet our spy creature.
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An encounter far closer
than ever imagined.
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The camera even reveals
his hitchhiking companions.
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Harmless remora fish,
enjoying a free ride.
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Our spy is gaining an insight
into how relationships
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form among whales.
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Being allowed so close
is a sign of acceptance.
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The mother is so trusting,
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she leaves her calf and
heads to the ocean depths.
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She'll dive nearly 2 miles below.
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Leaving a friend
to look after her calf.
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Spy whale seems to be welcome too.
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WHALE CLICKS
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Together, they'll stay with the calf
until the mother returns.
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Our spy is now perfectly placed
to discover more
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about the social intelligence
of the whales.
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In the coral reefs of Indonesia,
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there are more intelligent
life forms to be found.
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Among them are the
weird and the wonderful.
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The smartest of all
is the coconut octopus.
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As well as the main brain
in its body,
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each of its eight arms
has a brain of its own.
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All nine brains can think
for themselves
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or even think as one when required.
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To help fathom it out
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another spy is needed.
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One programmed
to walk in a similar way.
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Its aim is to communicate
with the octopus
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to find out how clever it really is.
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What must he be thinking?
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Then, a clue.
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He's working out
whether it's friend or foe.
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It seems our spy is a friend.
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Just as well.
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He certainly has plenty of enemies.
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His soft body means
everyone's out to get him.
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And not just him.
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HISSING
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Such dangers are small fry compared
with the ocean's top predators.
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Blacktip sharks hunt octopus.
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Fortunately, our spy
doesn't smell like one.
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Not so the real thing.
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He may hide, but they could
still find him.
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Time for some quick thinking.
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A hollow bamboo shows promise.
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DRAMATIC MUSIC PLAYS
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But its open entrance
is far from ideal.
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Our spy may have the answer.
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It's just what the octopus needs.
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But will he dare take it from him?
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GRIPPING MUSIC PLAYS
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Like a seasoned thief,
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he tries to avoid raising suspicion.
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Being aware of what others
could be thinking
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is a sign of deep intelligence.
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SUSPENSEFUL MUSIC PLAYS
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A perfect fit.
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And just in time.
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With nothing worth eating,
the sharks move on.
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The coconut octopus
need hide no more.
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As a sign of acceptance,
he shows his true feelings.
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As their relationship grows, there
will be plenty more to discover.
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MONKEY SQUEAKS
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Of all sea-goers, few are cleverer
than these Thailand macaques.
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Spy macaque is discovering
how they survive
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on this remote island.
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It too has a camera in its eye.
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MONKEYS CHATTER AND SQUEAK
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It can not only film
above the surface,
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but underwater, too.
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As well as being able to swim,
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it has a fully waterproof
camera eye.
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SOOTHING MUSIC PLAYS
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Perfect for filming these freedivers
searching for shellfish.
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They can hold their breath
for a minute or more.
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When they come up for air,
there's more seafood to find.
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MACAQUE SQUEAKS
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Our spy has acquired spy oyster.
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Together they capture
a filming first.
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These monkeys have gone fishing...
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..grabbing whatever
is trapped in pools.
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It takes quick-witted reactions.
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And a firm grip.
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HIGH PITCHED CALL
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Youngsters learn to fish
by copying their elders.
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SQUEALING
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Learning to know their place
comes second.
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MONKEY CHATTERS
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Fish course over,
there's more seafood on the menu.
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Oysters embedded in the rocks.
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They can't be removed
by brute force alone.
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It's a task
only the best minds can crack.
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Those that can wield a tool.
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MONKEY SCREECHES
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A treat worth the effort.
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Finding the right rock is a knack.
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MONKEY CHATTERS
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It must be the
correct weight and size.
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Like this one,
designed for the job in hand.
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Even so, he must be careful.
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One slip could be nasty.
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MONKEY GROANS
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It's the perfect tool.
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Or was.
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Oh, well...
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Macaques usually eat fruits
and seeds,
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so they've had to adapt
to survive here.
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They learn from an early age
what can or can't be eaten.
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YOUNG MONKEY SQUEALS
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SQUEALING CONTINUES
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Knowledge comes with experience.
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It starts with a sense of curiosity.
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But others are curious too.
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COMICAL MUSIC PLAYS
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Climbing with a spy cam isn't easy.
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Whoops!
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No bother.
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If you're smart, you know
how to have fun.
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SPLASHING, SQUEAKING
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CACOPHONY OF SQUEAKS AND CALLS
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A chance to make friends
and let off steam.
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NOISY SQUEALING
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As our spies found, macaques
cast away on a remote island,
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have found clever ways to adapt.
172
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Creative thinking can also be used
to find a mate.
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In the Sea of Japan,
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there's even a sea creature
who creates works of art.
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Spy pufferfish
is on a mission to find it.
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The artist-in-residence
won't be found among the coral.
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It needs a blank canvas
to work with.
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Something only the sand provides.
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And here it is.
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An exquisite sand sculpture found
nowhere else on Earth.
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00:19:19,200 --> 00:19:21,080
ETHEREAL-STYLE MUSIC PLAYS
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The artist at work is a
male Japanese pufferfish.
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He's designed his masterpiece
to lure in a mate.
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An artistic creation
to delight a female's eye.
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He uses a fin to plough a furrow.
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00:20:16,760 --> 00:20:19,920
While other fins sweep
the sand into ridges.
187
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The gullies channel the finest
particles towards the centre.
188
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The result is a fully functional
work of art.
189
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It's now spy puffer's turn.
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Artworks are best viewed
at a distance.
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Oh, dear...
192
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Nothing compares to the true artist.
193
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The female will decide.
194
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Spy puffer's creation is hardly
worth a second look.
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She's after a masterpiece.
196
00:21:45,480 --> 00:21:48,000
But for this discerning art critic,
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there's still room for improvement.
198
00:21:53,000 --> 00:21:56,080
Especially when some debris
spoils the design.
199
00:21:58,600 --> 00:22:01,480
A blemish easily dealt with
by the male.
200
00:22:08,320 --> 00:22:11,320
But it still needs
some finishing touches...
201
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..such as shells to decorate
the ridges.
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They are more than an
artistic flourish.
203
00:22:24,480 --> 00:22:27,480
They stabilise the ridges,
slowing the water
204
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that might stir the centre.
205
00:22:31,920 --> 00:22:35,520
For this is where the female
will lay her eggs.
206
00:22:36,880 --> 00:22:39,560
But the male has run out of shells
207
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and the female is losing interest.
208
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Spy puffer becomes the
artist's assistant.
209
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The finishing touch he needs.
210
00:22:59,640 --> 00:23:01,840
HUMOROUS MUSIC PLAYS
211
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All this striving for artistic
perfection is a test of his fitness.
212
00:23:43,160 --> 00:23:45,840
Satisfied with the
aesthetic details,
213
00:23:45,840 --> 00:23:47,800
the female enters the nest.
214
00:23:53,200 --> 00:23:55,960
They join together cheek-to-cheek.
215
00:23:55,960 --> 00:23:57,720
SOARING MUSIC PLAYS
216
00:24:01,800 --> 00:24:06,760
Then quick as a flash,
the eggs are laid and fertilised.
217
00:24:10,360 --> 00:24:12,840
With a little help from spy puffer,
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00:24:12,840 --> 00:24:16,720
the next generation
of artists is secure.
219
00:24:22,080 --> 00:24:25,520
While pufferfish think creatively,
220
00:24:25,520 --> 00:24:28,320
fish shoals all think together.
221
00:24:29,600 --> 00:24:32,800
They show swarm intelligence,
moving as one
222
00:24:32,800 --> 00:24:36,400
as they mirror the moves
of their nearest neighbours.
223
00:24:39,760 --> 00:24:44,440
Their group thinking is about
to be tested by smarter minds.
224
00:24:47,920 --> 00:24:49,320
Marlin.
225
00:24:51,320 --> 00:24:54,000
One of the oceans'
fastest predators.
226
00:24:55,680 --> 00:25:00,600
They use teamwork to drive mackerel
up from the depths,
227
00:25:00,600 --> 00:25:04,400
forcing them to the surface
in ever tighter balls.
228
00:25:06,040 --> 00:25:08,400
They are not alone.
229
00:25:08,400 --> 00:25:10,760
Sea lions soon join the gathering.
230
00:25:14,360 --> 00:25:16,600
Among them is a new spy creature.
231
00:25:18,760 --> 00:25:20,640
Spy sea lion.
232
00:25:22,040 --> 00:25:25,800
Like the real thing,
its flexible body lets it manoeuvre
233
00:25:25,800 --> 00:25:27,560
among the shoals.
234
00:25:36,800 --> 00:25:41,640
Its eye cams gain a sea lion's view
as the marlin spear their prey.
235
00:25:51,800 --> 00:25:53,400
Like master swordsmen,
236
00:25:53,400 --> 00:25:56,800
they use their metre-long bills
as a deadly weapon.
237
00:26:03,800 --> 00:26:08,320
As the hunt continues,
our spy films an insider's view.
238
00:26:12,200 --> 00:26:14,200
It won't be working alone.
239
00:26:15,760 --> 00:26:19,640
As frigatebirds gather,
another spy joins...
240
00:26:22,440 --> 00:26:25,800
..one that captures the marlins'
skills from the air.
241
00:26:31,920 --> 00:26:35,160
They corral the shoal,
concentrating the ball.
242
00:26:40,440 --> 00:26:43,520
Letting them pick off the fish
on the outside.
243
00:26:46,400 --> 00:26:49,360
But they don't have it all
their own way.
244
00:26:53,160 --> 00:26:55,160
The marlin will soon be competing
245
00:26:55,160 --> 00:26:57,800
with those with far greater
intelligence.
246
00:27:02,120 --> 00:27:06,080
Spy sea lion now
has plenty of company.
247
00:27:08,040 --> 00:27:10,720
They are here in their hundreds.
248
00:27:15,880 --> 00:27:19,680
Working together, they steal
the bait ball from the marlin...
249
00:27:23,240 --> 00:27:26,160
..seen through the camera eye
of our spy.
250
00:27:31,560 --> 00:27:33,600
The marlin retreat.
251
00:27:35,200 --> 00:27:38,160
They can't risk damaging
their fragile bills
252
00:27:38,160 --> 00:27:40,360
or receiving a nasty bite.
253
00:27:44,880 --> 00:27:48,560
Our spy reveals what happens
once the sea lions take over.
254
00:27:52,320 --> 00:27:56,360
It joins them as they unite
to split the ball.
255
00:28:01,120 --> 00:28:04,680
Capturing a sea lion's view
from inside the shoal...
256
00:28:07,440 --> 00:28:10,200
..it shows how the fish move as one.
257
00:28:22,920 --> 00:28:26,560
Its swarm intelligence pitched
against that of the sea lions.
258
00:28:31,560 --> 00:28:34,640
This is where true intelligence
shows its worth.
259
00:28:37,280 --> 00:28:40,880
They work together
to force the shoal apart.
260
00:28:42,560 --> 00:28:46,080
They can now pick off the weak
and injured.
261
00:28:49,920 --> 00:28:53,360
Sea lions can eat 15 kilos
of fish a day.
262
00:28:56,640 --> 00:29:00,880
But such a colossal bait ball
is too much, even for them.
263
00:29:03,520 --> 00:29:06,800
They start to play with their food
rather than eat it.
264
00:29:18,840 --> 00:29:21,040
Then, something unexpected.
265
00:29:27,160 --> 00:29:30,320
They gift the leftovers
to the hungry marlin.
266
00:29:37,480 --> 00:29:41,000
There's even a fish
for spy sea lion.
267
00:29:52,000 --> 00:29:53,760
Not much use to our spy.
268
00:29:55,920 --> 00:29:57,720
It is to the marlin.
269
00:30:00,480 --> 00:30:04,440
The sea lions may have outsmarted
swarm intelligence...
270
00:30:06,040 --> 00:30:08,800
..but even they can be beaten
by a bigger power.
271
00:30:10,160 --> 00:30:11,760
OMINOUS MUSIC PLAYS
272
00:30:15,960 --> 00:30:20,160
A Bryde's whale will make short
work of what they've left.
273
00:30:30,160 --> 00:30:33,400
Back on the reef, there
are more insights to be gained
274
00:30:33,400 --> 00:30:35,240
from the coconut octopus.
275
00:30:44,800 --> 00:30:49,080
Spy octopus is still nurturing
its new-found relationship.
276
00:30:58,320 --> 00:31:00,840
Their bond has only grown stronger.
277
00:31:05,480 --> 00:31:08,160
To feed, he must leave his hideaway.
278
00:31:17,080 --> 00:31:20,400
As a precaution, he takes
the coconut shell with him.
279
00:31:30,040 --> 00:31:34,160
What was once the door to his refuge
is now a mobile home.
280
00:31:34,160 --> 00:31:36,400
ZANY MUSIC PLAYS
281
00:31:50,760 --> 00:31:53,520
But there are more
surprises in store.
282
00:31:54,800 --> 00:31:59,280
The octopus is still looking
to improve his security.
283
00:32:01,000 --> 00:32:03,760
Some armour plating
wouldn't go amiss.
284
00:32:07,040 --> 00:32:08,960
A shell would be perfect.
285
00:32:23,000 --> 00:32:25,840
His only problem is carrying it all.
286
00:32:28,480 --> 00:32:30,320
COMICAL MUSIC PLAYS
287
00:32:39,280 --> 00:32:42,160
This is taking defence seriously.
288
00:32:49,160 --> 00:32:53,840
All bases covered, he's perfectly
placed to stage an ambush.
289
00:33:02,360 --> 00:33:04,600
And what better than a crab?
290
00:33:07,600 --> 00:33:08,760
The chase is on.
291
00:33:08,760 --> 00:33:10,920
CLANDESTINE-STYLE MUSIC PLAYS
292
00:33:13,880 --> 00:33:17,040
But the crab has a trick of its own.
293
00:33:17,040 --> 00:33:19,640
It heads to the surface.
294
00:33:19,640 --> 00:33:21,440
So does the octopus.
295
00:33:29,560 --> 00:33:31,120
He makes a grab.
296
00:33:39,040 --> 00:33:40,680
It's firmly in his grasp.
297
00:33:40,680 --> 00:33:42,440
But he must eat quickly.
298
00:33:45,000 --> 00:33:46,840
He's being watched.
299
00:33:49,040 --> 00:33:51,640
A rival coconut octopus.
300
00:33:54,920 --> 00:33:57,880
His colour change shows
he means business.
301
00:34:04,600 --> 00:34:07,320
To up the ante,
he makes himself bigger.
302
00:34:11,440 --> 00:34:13,720
But the octopus stands his ground...
303
00:34:15,600 --> 00:34:18,280
..before firing a salvo of shells.
304
00:34:22,720 --> 00:34:25,400
He retreats to his fortified home.
305
00:34:29,680 --> 00:34:33,480
And grabs a discarded paint lid
to act as a shield.
306
00:34:39,480 --> 00:34:41,600
He's now ready for anything.
307
00:34:43,720 --> 00:34:46,560
Including taking the paint
lid with him.
308
00:34:46,560 --> 00:34:48,720
CLANDESTINE-STYLE MUSIC PLAYS
309
00:35:05,160 --> 00:35:06,920
One last challenge.
310
00:35:10,000 --> 00:35:12,000
But soon seen off.
311
00:35:14,280 --> 00:35:16,760
That's how he treats his enemies.
312
00:35:25,960 --> 00:35:28,400
This is how he treats his friends.
313
00:35:28,400 --> 00:35:29,960
SOOTHING MUSIC PLAYS
314
00:35:48,920 --> 00:35:50,840
Few are as clever,
315
00:35:50,840 --> 00:35:53,200
but for organisational skills,
316
00:35:53,200 --> 00:35:55,200
he has serious competition.
317
00:35:59,480 --> 00:36:02,000
In the tropical paradise of Belize,
318
00:36:02,000 --> 00:36:04,320
the hermit crabs have a problem.
319
00:36:10,120 --> 00:36:12,200
They've outgrown their home.
320
00:36:13,680 --> 00:36:17,520
Or their shells have become
worse for wear.
321
00:36:26,600 --> 00:36:29,880
They need to upsize
their accommodation.
322
00:36:32,400 --> 00:36:35,400
And a new home
has just come on the market.
323
00:36:41,800 --> 00:36:44,160
Those interested start measuring up.
324
00:36:48,800 --> 00:36:51,120
This one certainly has potential.
325
00:36:58,840 --> 00:37:02,520
But others, too,
are showing interest.
326
00:37:07,480 --> 00:37:10,240
Even squabbling
over who should move in.
327
00:37:13,880 --> 00:37:15,760
For some, it's too big.
328
00:37:15,760 --> 00:37:17,720
For others, it's too small.
329
00:37:19,440 --> 00:37:24,040
To resolve the issue, they must stop
squabbling and cooperate.
330
00:37:29,720 --> 00:37:33,600
To find out how,
another spy goes undercover.
331
00:37:37,360 --> 00:37:40,000
One with a camera in its shell.
332
00:37:44,360 --> 00:37:47,080
It's arrived at the perfect moment.
333
00:37:52,760 --> 00:37:55,560
The crabs line up in order of size.
334
00:37:57,640 --> 00:38:00,600
They don't all need
grand accommodation.
335
00:38:02,600 --> 00:38:04,920
They just need the next size up.
336
00:38:06,760 --> 00:38:09,760
First, they must find their correct
place in the queue.
337
00:38:18,560 --> 00:38:21,320
They wait until
everyone is assembled.
338
00:38:24,960 --> 00:38:27,080
Then the house swap begins.
339
00:38:29,080 --> 00:38:31,040
The largest leaves his old home
340
00:38:31,040 --> 00:38:33,720
and moves into the vacant
shell next door.
341
00:38:35,560 --> 00:38:39,400
Then the next size down takes
over the shell he left behind.
342
00:38:40,840 --> 00:38:43,760
And so it goes on in order of size.
343
00:38:43,760 --> 00:38:45,200
COMICAL MUSIC PLAYS
344
00:38:51,400 --> 00:38:54,200
But exchanging houses
is not without problems.
345
00:38:55,880 --> 00:38:58,120
Some have buyer's remorse...
346
00:39:00,200 --> 00:39:02,560
..and try to keep both properties.
347
00:39:11,560 --> 00:39:13,600
Most are content
with their new home.
348
00:39:15,440 --> 00:39:18,520
Although one
seems to have house envy.
349
00:39:23,960 --> 00:39:26,320
He's eyeing up our spy.
350
00:39:29,160 --> 00:39:32,440
He just needs to check the shell
for size.
351
00:39:48,360 --> 00:39:51,800
It meets his requirements
so he doesn't waste time.
352
00:39:57,560 --> 00:40:00,240
But this home comes
with responsibilities.
353
00:40:03,640 --> 00:40:06,360
Ones that involve filming, too.
354
00:40:19,080 --> 00:40:22,080
But our new spy seems
to be having second thoughts.
355
00:40:25,280 --> 00:40:28,280
His old shell
was a better fit after all.
356
00:40:30,600 --> 00:40:32,960
He'll keep it for a little longer.
357
00:40:40,560 --> 00:40:44,520
Our spy is now
the only crab left homeless.
358
00:40:50,560 --> 00:40:54,160
The Caribbean is home
to yet more clever minds.
359
00:40:55,960 --> 00:41:00,280
This tiny island in the Bahamas
has been colonised by wild pigs.
360
00:41:00,280 --> 00:41:02,760
SQUEAKING
361
00:41:02,760 --> 00:41:06,800
They spend much of their day
just above the tide line.
362
00:41:08,520 --> 00:41:10,400
GENTLE GRUNTING
363
00:41:12,960 --> 00:41:16,600
To discover how they
survive on this remote island,
364
00:41:16,600 --> 00:41:18,600
spy piglet joins the team.
365
00:41:19,760 --> 00:41:21,840
PIGS GRUNT
366
00:41:24,720 --> 00:41:28,560
Pigs are highly intelligent
and sociable animals.
367
00:41:33,600 --> 00:41:36,320
So a new pig soon piques
their interest.
368
00:41:41,960 --> 00:41:43,640
PIG SQUEALS
369
00:41:43,640 --> 00:41:46,480
Nudging snouts
is a friendly gesture.
370
00:41:46,480 --> 00:41:48,520
COCKEREL CROWS
371
00:41:48,520 --> 00:41:50,160
A promising start.
372
00:41:54,040 --> 00:41:57,320
Introductions over,
they head to the sea.
373
00:41:57,320 --> 00:41:59,440
PIGS GRUNT HAPPILY
374
00:42:01,800 --> 00:42:04,920
The pigs' daily ritual begins.
375
00:42:15,760 --> 00:42:18,840
To find out why they enjoy
swimming so much,
376
00:42:18,840 --> 00:42:22,320
spy pig is soon hot
on their curly tails.
377
00:42:24,400 --> 00:42:27,800
What better way to find out
what's going on?
378
00:42:32,960 --> 00:42:35,840
It's clear that they are
expert swimmers.
379
00:42:39,920 --> 00:42:42,400
And even here they're sociable, too.
380
00:42:42,400 --> 00:42:43,880
RELAXING MUSIC PLAYS
381
00:42:49,840 --> 00:42:52,200
Our spy gets another greeting.
382
00:42:52,200 --> 00:42:54,640
GRUNTING AND SNUFFLING
383
00:43:12,160 --> 00:43:14,840
Pigs were brought to the island
in the '50s,
384
00:43:14,840 --> 00:43:18,400
surviving on crabs and berries
or whatever else they could find.
385
00:43:20,280 --> 00:43:23,920
As numbers grew, they looked
to the ocean for a meal.
386
00:43:28,600 --> 00:43:31,480
Tourism brought new opportunities.
387
00:43:33,840 --> 00:43:37,840
Each day, boats bringing food
would visit them...
388
00:43:37,840 --> 00:43:40,200
ENGINE PUTTERS
389
00:43:40,200 --> 00:43:42,760
..until the sound of outboards
390
00:43:42,760 --> 00:43:44,960
became their dinner bell.
391
00:43:49,560 --> 00:43:52,520
As word got around,
more boats arrived
392
00:43:52,520 --> 00:43:56,000
until the pigs' daily excursions
became a way of life.
393
00:44:00,440 --> 00:44:02,240
A banquet for all.
394
00:44:07,360 --> 00:44:09,520
PIG GRUNTS
395
00:44:17,080 --> 00:44:19,240
They may be social creatures,
396
00:44:19,240 --> 00:44:22,320
but manners are forgotten
when mealtime arrives.
397
00:44:27,680 --> 00:44:31,560
Now, it's every pig for itself.
398
00:44:33,800 --> 00:44:36,320
And not just pigs.
399
00:44:36,320 --> 00:44:38,000
BIRDS SQUAWK
400
00:44:38,000 --> 00:44:40,520
Gulls know when
it's feeding time, too.
401
00:44:40,520 --> 00:44:42,440
CACOPHONY OF CRIES
402
00:44:51,600 --> 00:44:54,160
Even stingrays join the party.
403
00:44:59,320 --> 00:45:02,720
The gathering lasts
until the feeding is over.
404
00:45:05,280 --> 00:45:09,600
The pigs' intelligence created
this tourist attraction.
405
00:45:11,840 --> 00:45:15,080
But it doesn't take a genius to know
when all the food is gone.
406
00:45:15,080 --> 00:45:17,000
SHAMEFACED-STYLE MUSIC PLAYS
407
00:45:31,680 --> 00:45:35,400
The search for intelligent life
is taking our spy creatures
408
00:45:35,400 --> 00:45:37,640
to many ocean realms.
409
00:45:39,800 --> 00:45:42,120
But it's the reefs
that provide shelter
410
00:45:42,120 --> 00:45:44,520
for a quarter of all marine life.
411
00:45:47,080 --> 00:45:50,280
Amongst all this abundance
is spy crab.
412
00:45:57,280 --> 00:46:02,720
He's here to discover the social
intelligence of a very special fish.
413
00:46:06,880 --> 00:46:09,960
But not all fish here are friendly.
414
00:46:12,480 --> 00:46:15,360
Just as well our crab has
an armoured shell.
415
00:46:15,360 --> 00:46:17,800
SUSPENSEFUL MUSIC PLAYS
416
00:46:31,560 --> 00:46:34,720
Beyond the reef is our spy's
subject of interest.
417
00:46:40,680 --> 00:46:43,160
Fish that have found a way
to keep safe
418
00:46:43,160 --> 00:46:45,560
away from the protection
of the reef.
419
00:46:55,040 --> 00:46:57,520
Our undercover crustacean
420
00:46:57,520 --> 00:47:00,000
will find out how they do it.
421
00:47:00,000 --> 00:47:04,160
The fish in question are
saddleback clownfish.
422
00:47:04,160 --> 00:47:08,080
They use carpet anemones
as their fortress and home.
423
00:47:10,840 --> 00:47:14,200
Its tentacles are laced
with a deadly toxin,
424
00:47:14,200 --> 00:47:17,520
but the clownfish have
acquired immunity.
425
00:47:18,960 --> 00:47:21,000
No predators dare come near.
426
00:47:24,720 --> 00:47:29,480
In return, the clownfish
all muck in to keep the anemone
427
00:47:29,480 --> 00:47:31,000
spick and span.
428
00:47:41,320 --> 00:47:43,760
But no matter how well-kept,
429
00:47:43,760 --> 00:47:45,280
no home is perfect.
430
00:47:47,640 --> 00:47:52,160
To raise a family, they need
somewhere safe to lay their eggs.
431
00:47:52,160 --> 00:47:55,360
A bed of poison is hardly a nursery.
432
00:48:01,320 --> 00:48:05,640
So a search party sets off
to find something more suitable...
433
00:48:07,920 --> 00:48:11,040
..with spy crab following on behind.
434
00:48:16,320 --> 00:48:18,960
Plastics are the scourge
of the ocean
435
00:48:18,960 --> 00:48:21,560
but clownfish are keen on recycling.
436
00:48:23,120 --> 00:48:26,360
A flip-flop would make
an ideal egg nursery
437
00:48:26,360 --> 00:48:29,000
if only they could bring
it back home.
438
00:48:44,520 --> 00:48:48,440
Even the enterprising clownfish
have no use
439
00:48:48,440 --> 00:48:50,080
for a plastic bottle.
440
00:48:55,840 --> 00:48:58,160
They dispatch it
as quickly as they can.
441
00:49:14,920 --> 00:49:17,320
They need something
more sustainable.
442
00:49:20,440 --> 00:49:24,320
Another job for spy octopus.
443
00:49:24,320 --> 00:49:26,160
COMICAL MUSIC PLAYS
444
00:49:35,360 --> 00:49:38,080
It has an environmentally
friendly solution.
445
00:49:44,640 --> 00:49:46,720
Just what they were looking for.
446
00:49:55,200 --> 00:49:57,920
In an astonishing
display of teamwork,
447
00:49:57,920 --> 00:50:00,280
they take the coconut shell
to the anemone.
448
00:50:11,560 --> 00:50:15,640
Among fish, such close cooperation
has rarely been filmed.
449
00:50:18,240 --> 00:50:22,120
They even tuck it into the
safest spot in the anemone.
450
00:50:32,840 --> 00:50:34,800
But they have more work to do.
451
00:50:39,120 --> 00:50:41,280
A little wash and brush-up
is needed.
452
00:50:44,400 --> 00:50:47,360
Let egg laying begin.
453
00:50:47,360 --> 00:50:49,240
ETHEREAL-STYLE MUSIC PLAYS
454
00:51:01,160 --> 00:51:02,840
A nursery at last.
455
00:51:15,920 --> 00:51:19,960
The male will tend the eggs, keeping
them clean and well-aerated.
456
00:51:28,000 --> 00:51:31,560
A week later, their young
are ready to emerge.
457
00:51:33,320 --> 00:51:37,440
The reward for the clownfish's
close cooperation.
458
00:51:37,440 --> 00:51:40,960
One where spy octopus played a part.
459
00:51:48,360 --> 00:51:50,200
As our spies discovered,
460
00:51:50,200 --> 00:51:53,160
sea creatures have many unique ways
of thinking.
461
00:51:56,400 --> 00:52:00,240
But none match the intelligence
of the biggest brains of all.
462
00:52:04,680 --> 00:52:07,800
Spy sperm whale was left
on baby-sitting duties.
463
00:52:07,800 --> 00:52:10,640
GUTTURAL HUMMING
464
00:52:16,360 --> 00:52:20,680
It's now keeping watch
on an increasingly restless calf.
465
00:52:28,240 --> 00:52:31,680
Another of its cameras
reveals why he's excited.
466
00:52:31,680 --> 00:52:33,520
WHALE MAKES CLICKING NOISE
467
00:52:33,520 --> 00:52:36,480
Below, his mother is returning.
468
00:52:38,760 --> 00:52:42,800
She's been away for many hours
and her calf is hungry.
469
00:52:42,800 --> 00:52:45,520
CLICKING CONTINUES
470
00:52:45,520 --> 00:52:48,120
He's heard his mother's unique call.
471
00:52:52,040 --> 00:52:54,600
Spy whale follows close behind.
472
00:52:58,320 --> 00:53:00,360
Even into the depths.
473
00:53:04,000 --> 00:53:08,440
Here, our spy captures the moment
the mother positions herself
474
00:53:08,440 --> 00:53:10,560
vertically to feed her calf.
475
00:53:11,680 --> 00:53:14,920
HUMMING AND CLICKING
476
00:53:16,840 --> 00:53:18,920
Finally, he finds the spot.
477
00:53:20,960 --> 00:53:24,000
Only now does his mother
release her milk.
478
00:53:28,880 --> 00:53:30,480
Instead of suckling,
479
00:53:30,480 --> 00:53:33,480
the calf drinks the milk
as it flows into the water.
480
00:53:35,880 --> 00:53:39,960
It's so rich, even diluted, he only
needs a little to be satisfied.
481
00:53:44,640 --> 00:53:47,240
Then his mother
does something surprising.
482
00:53:48,920 --> 00:53:51,360
She positions herself
the other way up...
483
00:53:52,800 --> 00:53:55,200
..and claps the water with her tail.
484
00:53:55,200 --> 00:53:57,520
POWERFUL BANG
485
00:54:12,000 --> 00:54:15,080
Each slap is a signal
that carries for miles.
486
00:54:17,360 --> 00:54:19,400
MUFFLED BANG
487
00:54:20,480 --> 00:54:23,520
One heard by families
from far and wide.
488
00:54:25,240 --> 00:54:27,360
MUFFLED BANG
489
00:54:32,960 --> 00:54:35,240
MUFFLED BANG
490
00:54:50,760 --> 00:54:53,680
For the mother and calf,
it's a special moment.
491
00:54:53,680 --> 00:54:56,440
WHALE CLICKS
492
00:55:05,480 --> 00:55:09,040
A family reunion
that has rarely been filmed.
493
00:55:12,160 --> 00:55:14,680
One that includes our very own spy.
494
00:55:18,880 --> 00:55:21,440
From deep in the heart
of the family,
495
00:55:21,440 --> 00:55:24,760
it now bears witness to
something extraordinary.
496
00:55:29,840 --> 00:55:32,840
Siblings, cousins, aunts
and grandmothers
497
00:55:32,840 --> 00:55:35,480
join together in a rare
social event.
498
00:55:38,480 --> 00:55:40,720
A meeting of intelligent minds.
499
00:55:46,720 --> 00:55:49,920
But are there thoughts,
ones we might recognise?
500
00:55:52,040 --> 00:55:55,000
For they share the brain cells
that help make us human.
501
00:55:56,280 --> 00:56:01,000
Specialised neurons that gave us
language, empathy and culture.
502
00:56:02,960 --> 00:56:06,800
They have more of these human-like
cells than any animal on Earth.
503
00:56:08,320 --> 00:56:10,680
It seems they are
deep in conversation.
504
00:56:10,680 --> 00:56:13,640
INTENSE CLICKING
505
00:56:13,640 --> 00:56:16,000
Even the calf joins in.
506
00:56:16,000 --> 00:56:19,600
But like human toddlers,
for now, it's just baby talk.
507
00:56:23,480 --> 00:56:25,760
Within this incredible gathering,
508
00:56:25,760 --> 00:56:30,400
information is exchanged and bonds
of friendship are strengthened.
509
00:56:33,240 --> 00:56:36,040
This rare event lasts
only a few minutes
510
00:56:36,040 --> 00:56:39,600
before each group
goes its separate ways.
511
00:56:41,040 --> 00:56:44,760
It was the calf's first meeting
with his extended family.
512
00:56:48,920 --> 00:56:51,800
He rejoins his own family
who have now caught up
513
00:56:51,800 --> 00:56:53,480
on the local gossip.
514
00:56:59,000 --> 00:57:03,560
For now, our spy is still deep
in their midst.
515
00:57:15,000 --> 00:57:18,920
Next time - our spies reveal
the deep feelings found
516
00:57:18,920 --> 00:57:21,240
among the creatures of the ocean...
517
00:57:23,320 --> 00:57:27,520
..to discover the origins
of our own emotions.
59758
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