0:00:04 > 0:00:08On Deadly 60 I've had loads of incredible animal encounters.
0:00:08 > 0:00:11Here's just one of my many favourites.
0:00:12 > 0:00:16This is Deadly 60 Bites.
0:00:16 > 0:00:19Deadly 60's taking us to every corner of the world,
0:00:19 > 0:00:21which I never really understood,
0:00:21 > 0:00:23cos the world doesn't have any corners.
0:00:23 > 0:00:27But of all of the sort of round bits of the world,
0:00:27 > 0:00:30this is probably the most magical.
0:00:30 > 0:00:32I'm in India.
0:00:35 > 0:00:41India is so huge, Great Britain would fit into it over 13 times.
0:00:42 > 0:00:46The next animal we're looking for in the Deadly 60 is a true dinosaur.
0:00:50 > 0:00:52They've been on the planet, almost unchanged,
0:00:52 > 0:00:54for over 100 million years.
0:00:57 > 0:00:59And it's one of the largest reptiles on Earth.
0:01:03 > 0:01:06They've got a frightening face full of teeth...
0:01:08 > 0:01:10..and they're also master fishermen.
0:01:13 > 0:01:17These aren't just your common or garden crocodiles.
0:01:17 > 0:01:21These crocs have adapted to become lethal fish killers,
0:01:21 > 0:01:23and they're called gharials.
0:01:24 > 0:01:29They have an elongated jaw with rows of razor-sharp, interlocking teeth,
0:01:29 > 0:01:33and a lighter skull than other crocs, allowing them to move quicker
0:01:33 > 0:01:36in the water. And this weird bulbous growth
0:01:36 > 0:01:39is found on the mature male individuals.
0:01:39 > 0:01:42In Indian, it's called a ghara, meaning pot.
0:01:42 > 0:01:46It's used to create a humming noise to attract females.
0:01:46 > 0:01:49Gharials have different muscles in their legs, which allow them
0:01:49 > 0:01:50to be the fastest crocs in the water.
0:01:50 > 0:01:54So, of all the different species of crocodiles in the world,
0:01:54 > 0:01:57gharial are the master fishermen. I'm here to find out how hard that is
0:01:57 > 0:02:01and also to catch some breakfast for a few friends we'll meet later on.
0:02:03 > 0:02:07All over the world, people use cast nets to catch small fish.
0:02:07 > 0:02:10I've tried it quite a few times before
0:02:10 > 0:02:13and I've never caught anything.
0:02:13 > 0:02:17But I've a really good feeling about this. How can I possibly fail?
0:02:21 > 0:02:24That's terrible.
0:02:25 > 0:02:28I'm sorry, Johnny!
0:02:28 > 0:02:30Come to Papa.
0:02:32 > 0:02:35Now that's what I'm talking about!
0:02:35 > 0:02:38Absolutely nothing.
0:02:38 > 0:02:41Literally, nothing.
0:02:47 > 0:02:52So, I've got this huge bucket of fish that I managed to catch this morning.
0:02:52 > 0:02:55- Liar.- And I'm going to see how close I can get
0:02:55 > 0:02:58to those fearsome gharial teeth.
0:02:58 > 0:03:03In order to do that, I've come to a captive breeding centre in the south.
0:03:03 > 0:03:07These amazing creatures are almost extinct in the wild.
0:03:07 > 0:03:10But this place is doing all it can to save them.
0:03:13 > 0:03:15There's a couple down there.
0:03:16 > 0:03:18Wow, they're quick!
0:03:18 > 0:03:21'Well, as they obviously aren't going to come to me,
0:03:21 > 0:03:23'I'm going to have to get my feet wet.'
0:03:23 > 0:03:25A-ha!
0:03:29 > 0:03:32You beauty!
0:03:32 > 0:03:34BABY QUACKS
0:03:34 > 0:03:38That is the cutest sound in the world.
0:03:38 > 0:03:42'There's only around 200 breeding pairs left in the wild.
0:03:42 > 0:03:44'Fewer than even giant pandas.
0:03:44 > 0:03:47'Hunting and pollution of the rivers where they live
0:03:47 > 0:03:49'are thought to be the causes.'
0:03:50 > 0:03:54It's just terrifying to think that an animal that's been around
0:03:54 > 0:03:56since before the dinosaurs
0:03:56 > 0:04:00can be coming to the brink of extinction because of us.
0:04:00 > 0:04:04But they're not going on the Deadly 60 because they're rare.
0:04:04 > 0:04:07These are fish-catching specialists.
0:04:09 > 0:04:13Look at the snout widthways on.
0:04:13 > 0:04:15It's very, very thin,
0:04:15 > 0:04:18which means it'll carve through the water a lot quicker
0:04:18 > 0:04:22than the fatter, broader snouts of an alligator or a crocodile.
0:04:22 > 0:04:27Even at this size, the gharial really is a swimming fish trap.
0:04:27 > 0:04:30'But they get much bigger.
0:04:30 > 0:04:35'And to see just how huge they CAN get, I'm going to meet the parents.
0:04:35 > 0:04:38'And it's feeding time.'
0:04:38 > 0:04:40Now, this is more like it.
0:04:40 > 0:04:44MUSIC: Theme from "Jaws"
0:04:47 > 0:04:49That...
0:04:49 > 0:04:52is a big male gharial.
0:04:52 > 0:04:54Probably not completely fully grown -
0:04:54 > 0:04:56they get as big as six metres.
0:04:56 > 0:05:00But this one is going to be absolutely huge.
0:05:00 > 0:05:02Look at that face full of teeth.
0:05:02 > 0:05:04That is amazing.
0:05:06 > 0:05:08Could someone stop that music?!
0:05:08 > 0:05:11I know these crocs are enormous,
0:05:11 > 0:05:13but they're no danger to me.
0:05:14 > 0:05:18Gharials are fish specialists. That's what they feed on.
0:05:18 > 0:05:21And he's not going to try and take a bite of me
0:05:21 > 0:05:25cos he doesn't want to eat me - I'm hoping. Fingers crossed.
0:05:26 > 0:05:29Let's see if we can get to see those amazing jaws at work.
0:05:32 > 0:05:35Wow, did you see him catch that?!
0:05:37 > 0:05:42# If the fish swam out of the ocean
0:05:42 > 0:05:45# And grew legs and they started walking... #
0:05:45 > 0:05:49I know it looks ridiculous, the way they throw back their heads
0:05:49 > 0:05:52and just chug the fish back in one go,
0:05:52 > 0:05:55but it's all down to the fact that crocodiles can only open their mouths
0:05:55 > 0:05:58open and shut, they can't go side to side -
0:05:58 > 0:05:59their jaw just won't allow it.
0:05:59 > 0:06:03So, they throw their head back and let gravity drop the fish
0:06:03 > 0:06:05back into their gullet. It looks crazy,
0:06:05 > 0:06:08but it's worked for 100 million years, so it must be pretty good.
0:06:11 > 0:06:15To us, the gharial's totally harmless
0:06:15 > 0:06:19but an utterly unique marvel of nature.
0:06:19 > 0:06:21To a fish, though,
0:06:21 > 0:06:24it's an absolute swimming nightmare.
0:06:24 > 0:06:27And that's why the gharial's going on my Deadly 60.
0:06:32 > 0:06:34Unchanged for over 100 million years,
0:06:34 > 0:06:38gharials can grow up to six metres in length.
0:06:38 > 0:06:40They're streamlined, lightning-fast snouts
0:06:40 > 0:06:42whip through the water after their pray.
0:06:42 > 0:06:46If you're a fish and unlucky enough to meet one of them on the prowl,
0:06:46 > 0:06:48then it's game over.