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The Amazon... a wilderness teeming with wildlife

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But one part is still totally unexplored

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Under the water.

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Hidden in the river lie some of the
fiercest and strangest creatures on Earth

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Man may have walked on the Moon
but no one has journed to the very bottom of the Amazon

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Until now.

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An expedition is searching for the animals hidden in the depths.

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We're looking in the places that no one has looked.
We have the ability

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to see and film things that no one has ever seen.

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We've not just scratched the surface of the Amazon,
but we've gone beneath it.

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And we're bringing back stuff that is going to make people go:

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WOW !

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But the world's greatest river

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doesnt give up her secrets easily.

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Manaus, in the heart of the jungle

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Bristling with sailors and river traders.

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It's day one for our explorers.

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They're some of the most experienced divers in the world,

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but they're going where no one has ever dive before.

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For the next 5 weeks this boat will be their home

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Their mission : to take the BBC cameras

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to this last great unexplored habitat.

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In search of unique creatures of the deep.

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The diving is led by Mike DeGruy

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professional cameraman

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veteran of "The Blue Planet" and 100 other wild life films.

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We really are on a wonderful expedition

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We have the opportunity to take all of this gear

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and film things nobody's ever seen, 
nobody's ever head of

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We're really gonna do it.

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Also on the dive team , explorer and naturalist
Kate Humble.

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It's the most beautiful boat.

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I feel like i'm about

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take part in African Queen.

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Their challenge is formidable.

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The Amazon hides its creatures in water so deep

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and dark, that no explorers have ever succeeded
in penetrating its depths.

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Their journey will be through the richest rainforest on the planet

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A jungle where a million species hide.

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But their adventure will take them
to the Amazon no one has seen before.

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Beneath the surface of this immense river.

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4000 miles long,

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in places wider than the English Channel,

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it would take 100 years to explore the 5000 tributaries...

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They have just one month.

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The multinational team of scientists and divers

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will have to overcome storms and setbacks
to discover species new to science,

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film underwater giants and track down primitive flesh feeding fish.

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Their 2000 mile journey will ultimately lead them

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to dive a black hole in the heart of the Amazon

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where , with underwater robots , they hope to find creatures hidden in the abyss.

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Kate is an experienced diver

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She searched for sharks for the BBC progam

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but, like the rest of the team, it's her first time in Brazil.

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This is really going to be my first rainforest experience.

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and all you hear about is the enormous number of diseases that you can get.

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Mike's made more that 5000 dives in every corner of the planet.

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As far as difficulty is concerned this rankes right up there.

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Other areas, like Antarctica, diving under the ice,

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has its own set of problems.

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These are unique problems.

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Everything kind of falls apart, nothing heals up properly

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and one little snag on your finger, will mean that
your finger will probably have to be amputated.

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On a good day, the visibility is terrible.

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We don't know where we're going, we have
no reference material and divers in this area,

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plus,...there are animals down there that can kill you.

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The Anaconda grows to over 9 meters long.

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and the cayman, weighing in a quarter of a ton

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just 2 of the man eaters that hide in this murky waters.

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Over the next month the divers will come face to face with both of them.

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There are 3 boats in the expedition : one for living,

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one for support, and one for diving.

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Their fist mission is to travel to a remote tributary of the Amazon

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The scientists belive it is home to many rare species.

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As they draw near to their destination,
every second is spent preparing the equipment.

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Safety is everything.

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Most important of all, they must be able
to talk to each other under water.

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It could save their lives.

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Every single person underwater

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can talk to each other, as well as talk to the boat

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wich is where Mike will be with our topside cam unit

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he'll be able to talk to us and we'll have great communication

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and I personally feel that the communication
is the key to the safety of this operation.

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The expedition has reached the first dive site.

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The whole team is focused on the preparations,
and the gear had been checked and checked again.

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In these conditions there's no room for error.

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The air is cloudy and hot, the river will be just as warm.

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The aim of the dive :
To discover just how much can be seen underwater.

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It is a step into the unknown.

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Despite the heat, for their own safety
they must be covered from head to foot.

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There's no way i'm not going in with all this protection,
having heard what there is in there.

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As they descend, the divers discover a different world.

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The water is heavy with sediment,
and they quicly loose sight of one another.

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Anything could be swiming past them, and still not be seen.

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The state of their diving gear allows them
to stay in the water until night has fallen,

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but they still haven't seen a single creature.

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It was so murky, i had a torch held to my computer

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and i couldn't see it this way.

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You can't help but think these animals have developed a way

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to sense through the muck.
There will be no reason

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to know how to do that. 
We don't live in a situation

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where the fartherst thing we can see in 15 inches away from us.

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They do,
If you can see anything down there at all

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then our cameras are a miracle...it's a miracle.

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The team are in somber mood.

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No one suspected the visibility to be quite so terrible.

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The whole future of the expedition is in doubt.

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But there's no giving up.

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First thing next morning, the boat is pushed further up the river

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and into the unknown , in search of better sites.

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The diving will be dangerous, the job of keeping everyone safe
rest with the dive master Richard Bull.

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In all the hair raising deep adventures diving I've ever done

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this is some of the most challenging I've ever come across.

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We have great expectations piled up on our heads,
to deliver unique images.

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Ok, well, I'll take that challenge on, but what it means is

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we got to go to different places and dive and dive, and dive.

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Powerful lights and high definition cameras
are being used to cut through the murky Amazon waters.

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But hi-tech gear brings no protection from predators.

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Mike Pitts has spent his carier filming dangerous creatures.

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I think if you can see something from a distance,
you don't think half as much about it

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when you have that very limited visibility

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and there are on you before you can even do anything about it

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It's like you can see a tiger shark from 30 meters away,
and you're happy, you're fine

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you can face it off, but in this low visibility it is a worry.

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Proffesional divers train to stay calm in the face of danger

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and keep their fear firmly under control.

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I'm not going in the water feeling 100% happy,

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but, once you have the camera in your hand,

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you're checking your focus, you're checking your lighting,
you're communicating with your buddy

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If you let yourself start thinking about it too much

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you'll allways been looking over your shoulder, behind you

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and I'm sure we're gonna get moments where you get bumped by
things down there.

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But people who have spent their life by the river

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are not so relaxed about the dangers.

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Samuel Basilio and Eduardo Gomez
are two local guides on the expedition.

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Their expert knowledge is essential to the success of the project.

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I have to be sure that nobody gonna be hurt by anything.

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and...I know that's my job...

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is to protect all the group.

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I've spent all my life fishing, I've been
in contact with them.

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stingrays and snakes and electric eels.

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I mean , they're really bad.

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Every year local people are attacked
and killed by underwater predators.

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The divers are not immune.

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The teeth of the red-belly piranha are razor-sharp

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and can easyly slice through a wet-suit.

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The electric eel will discharge 600 volts if disturbed

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leaving a diver unconscious.

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But for the people of the Amazon,
there is another creature feared even more.

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It lives in the depths of the river, and has never been filmed.

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The giant Jau.

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The Jau were not come to swallow men

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but maybe they got scared

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hit someone with their head

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pull you down...and this will be

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dangerous,...for sure.

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They bite, and altough they don't have sharp teeth

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but they have big mouths, when they're very big, they can swallow anything.

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Three friends of mine, they jump, and they decide to go swimming to the shore

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and one of them dissapeared, so...

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we never found his body... never.

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The giant Jau has a terrible reputation for draging
fishermen down into the depths, drowning them.

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Report have come in to the expedition team,
that Jau have been found further up river.

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We heard from the village that they got some contact

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They caught two Jau catfish a week and a half ago.

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Can we expect to actually find one under a ledge

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and we can get relatively close ?

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It's a unique opportunity to film one of the
Amazon's most infamous animals.

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You know about all these dangerous creatures, and the Jau is one of them.

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You know about anacondas, you know about caymans, you know about piranhas

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but the reality is that none of us has actually seen what they can do.

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You know, we haven't experienced it, so...

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in a funny sort of way, you're actually feeling a little bit...

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it will be fine, because the reality hasn't hit.

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Kate sets off upstream, to check out the information.

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As well as being part of the dive team, 

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over the next month Kate has the added task of

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tracking down the wild life on the river margins.

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This is just extrordinary.

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A family of capibaras.

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On the bank... is huge.

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Amazonian rodents.

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It looks like 4 young...

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I just know I'm not going to get back to the boats.

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But you can't afford to stop for long.

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She need to find a fisherman that has seen the Jau.

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Back downstream the countdown has started for the dive team.

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Oxygen supply pressure OK.

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Computer electronics turned on.

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Absorbant time-remainig OK.

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Oxygen turned on.

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Computer turned on.
Fine.

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Batteries OK.

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The pressure is on.

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They must find the creatures

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concealed by the river's turbulent waters.

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30 miles upstream, Kate has had a stroke of luck.

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She's found a fisherman who's seen Jau.

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In the murk, the divers can't find the Jau.

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In fact they're struggling to find anything.

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But then, something extraordinary.

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Gradually in the gloom, a giant colony of sponges

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appears before their eyes.

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Normally, these primitive creatures
are only ever found in the oceans.

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Looking closer, the divers slowly begin
to make out camouflaged creatures

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motionless, amongs the sponges.

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This prehistoric species wears an armor

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of sharpen scales as protection from predators.

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Even their fins hides switchblade spines.

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The river revealed an extraordinary array of catfish

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perfecly adapted to feel their way
through the darkness with gigantic whiskas.

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A whole community of exotic fish are hidden here.

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And then, allmost buried from sight, 

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the king of the river bed.

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The giant freshwater stingray.

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It's barbed tail laced with enough poison to cripple a diver.

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A tantalising glimpse before it dissapears into the gloom.

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The divers have been in the water for 3 hours now, 

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and air is runing low.

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Suddenly a little fresh water sponge appears.

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So we kept going up the slope

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more and more sponges, more and more fish

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It's the first time this unique habitat is been captured on camera.

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You keep reminding yourself
that you're in fresh water by tasting it.

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otherwise it looks like you're in the ocean,
they're not supposed to be in rivers

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Everybody knows that... so that was pretty spectacular.

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There's a sense of relief on the dive boat.

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At last, they're started to find creatures.

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But they all know, there are many more
spectacular creatures to be discovered.

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First thing next morning, Kate passes on her news.

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I've got a treat for you. I've got reports of Jau.

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I've met a fisherman that caught one ... 36 kilos.

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And he's pretty sure there's another one up there

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because he was descaling a fish... and this thing came out.

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Togheter, they start on a journey back upriver,
to the dive site Kate found.

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They are followed by the rest of the dive team

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Togheter they set about making camp on the beach.

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The water here is fast-flowing and strewn with boulders.

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Perfect condition for Jau and many other fish.

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The local delicacy...

241
00:22:40,727 --> 00:22:42,521
red belied piranha.

242
00:22:51,290 --> 00:22:55,469
The turbulence from the waterfall causes a scum of natural foam.

243
00:23:01,215 --> 00:23:05,469
The foam blocks  out the light, and the divers drop into darkness.

244
00:23:36,662 --> 00:23:41,366
The labirynth of ledges and caves are a perfect hideout for Jau.

245
00:24:08,109 --> 00:24:12,823
A pike cyclide is captured in the spotlight as it swims for cover.

246
00:24:46,306 --> 00:24:50,034
In a crevice, catfish shelter for hungry predators,

247
00:24:50,100 --> 00:24:53,377
and keep a watchful eye on the passing prey.

248
00:24:58,466 --> 00:25:03,067
At last a hint of the incredible life hidden in the river.

249
00:25:11,584 --> 00:25:16,241
They discover one of the most peculiar creatures
ever found in the deep.

250
00:25:16,298 --> 00:25:17,734
Knive-fish

251
00:25:19,199 --> 00:25:24,307
These quirks of evolution navigate
in the dark waters by using a sixth sense.

252
00:25:24,383 --> 00:25:28,711
Electrical pulses generated by highly adapted muscles.

253
00:25:29,012 --> 00:25:33,716
They're so specialised, they can even talk to each other
with their electrical signals.

254
00:25:45,574 --> 00:25:48,936
And hiding in a sunken lobe, a price...

255
00:25:49,039 --> 00:25:51,799
one of the largest knive-fish in the world

256
00:25:56,381 --> 00:26:00,870
Called the Black Ghost, it is shy, nocturnal and rare.

257
00:26:00,954 --> 00:26:04,250
And has never been filmed in the wild before.

258
00:26:13,969 --> 00:26:16,560
There is still no sight of the Jau.

259
00:26:16,702 --> 00:26:19,415
But in this maze of rocks and caves,

260
00:26:19,444 --> 00:26:22,918
its secret layer can be just feet away.

261
00:26:44,908 --> 00:26:48,035
Fortunately, the piranhas are keeping their distance.

262
00:26:48,185 --> 00:26:53,916
And now, with their air getting low,
the divers are forced to stop their search for Jau.

263
00:27:09,963 --> 00:27:14,151
A bit dissapointing... not to see the Jau.

264
00:27:14,310 --> 00:27:17,644
I mean, it was a very very very longshot.

265
00:27:18,638 --> 00:27:20,723
We found a lot of fish down there,

266
00:27:20,779 --> 00:27:23,446
and almost all of them hated the light,

267
00:27:23,658 --> 00:27:28,794
and were tucked away in nasty little rock or wood crevices.

268
00:27:28,870 --> 00:27:31,396
So you couldn't get a clear shot of them.

269
00:27:34,457 --> 00:27:38,644
I'm tempted to stay and dive in

270
00:27:38,729 --> 00:27:41,236
at least twice again tomorrow.

271
00:27:41,292 --> 00:27:43,968
Well that's why we're here, we want to see Jau.

272
00:27:44,053 --> 00:27:48,616
That's out goal, so anything that will increase our chances, I'm all for.

273
00:27:48,654 --> 00:27:52,936
This is been really nice, after my first dive yesterday
in that thick soup,

274
00:27:53,589 --> 00:27:56,706
to come here and actually see something living in the river...

275
00:27:56,866 --> 00:27:58,387
That was good.

276
00:28:04,275 --> 00:28:08,284
Now, in the dead of night, the divers drop into the darkness,

277
00:28:08,321 --> 00:28:11,542
for one more attempt to find the giant Jau.

278
00:28:17,083 --> 00:28:20,275
They know the creature is somewhere down there,

279
00:28:20,406 --> 00:28:22,313
watching them.

280
00:28:28,743 --> 00:28:32,321
Tomorrow the expedition moves on to second fase.

281
00:28:32,358 --> 00:28:35,598
They track down the endangered giant otter,

282
00:28:36,152 --> 00:28:39,035
swim with fresh water dolphins, 

283
00:28:40,584 --> 00:28:44,697
and come face to face with monsters of the deep.