1 00:00:01,701 --> 00:00:05,600 The Amazon...a wilderness teeming with wildlife. 2 00:00:06,147 --> 00:00:09,536 But one part is still totally unexplored. 3 00:00:09,779 --> 00:00:11,443 Under the water. 4 00:00:13,691 --> 00:00:18,781 Hidden in the river lie some of the fiercest and strangest creatures on Earth 5 00:00:19,121 --> 00:00:23,798 But the world's greatest river doesn't give up her secrets easily. 6 00:00:32,447 --> 00:00:34,925 Now , they're behind schedule. 7 00:00:38,059 --> 00:00:42,663 To make up time, they travel through the night, to reach their next diving location 8 00:00:42,736 --> 00:00:45,190 in the remotest jungle. 9 00:00:45,882 --> 00:00:50,936 We get into the Amazon of the imagination, with great dripping forest 10 00:00:51,179 --> 00:00:56,415 maybe narrow river... This idea, of going up into what we all 11 00:00:56,526 --> 00:01:02,794 affectionately call "The Heart of Darkness" is something that I've been looking for the entire trip. 12 00:01:04,993 --> 00:01:11,055 Their mission : to dive the labyrinth of lakes and forest streams that feed the Rio Negro. 13 00:01:15,063 --> 00:01:20,420 In the Amazon, the strangest creatures swims through the trees of the deepest jungle. 14 00:01:35,350 --> 00:01:39,869 The next afternoon, the expedition is surrounded by virgin forest. 15 00:01:43,805 --> 00:01:46,794 They decide to split into two teams. 16 00:01:46,891 --> 00:01:50,268 Cameraman Mike De Gruy and naturalist Kate Humble 17 00:01:50,353 --> 00:01:53,697 will be looking for clear water jungle streams. 18 00:01:56,466 --> 00:01:59,175 Our plan is to go upriver about an hour 19 00:01:59,248 --> 00:02:02,977 and find another little stream that comes out and explore yet another lake 20 00:02:03,001 --> 00:02:07,702 that has different fish, including electric eels. 21 00:02:10,399 --> 00:02:14,019 Over the thousands of species that lives in the jungle waters 22 00:02:14,080 --> 00:02:16,789 the electric eel is king. 23 00:02:17,129 --> 00:02:20,494 They hunt with 600 volt electric shocks 24 00:02:20,652 --> 00:02:24,284 and use the same weapon for defense. 25 00:02:24,636 --> 00:02:26,787 This fish breaths air, 26 00:02:26,896 --> 00:02:30,382 uniquely adapted to the oxygen-poor waters of the Amazon 27 00:02:30,564 --> 00:02:33,723 the lining of their mouths acts like a lung. 28 00:02:40,853 --> 00:02:44,741 Second team lider, Mike Pitts sets himself up for the day. 29 00:02:47,924 --> 00:02:54,326 He's going to a jungle lake, to film fish, but it's also a rumor to have a large crocodile 30 00:02:54,447 --> 00:02:58,431 A cayman,... one with a grudge against people. 31 00:02:58,613 --> 00:03:03,873 Somebody shot at it, and it's got either an eye missing, or a crease above the eye. 32 00:03:04,676 --> 00:03:09,474 It's been hit by one of the fishermen 33 00:03:10,823 --> 00:03:12,913 So, do you think that will make him more nervous ? 34 00:03:12,985 --> 00:03:16,156 He might have an attitude... he might have an attitude problem. 35 00:03:26,737 --> 00:03:31,244 Nearby, Mike and Kate are looking for a stream with clear water. 36 00:03:46,247 --> 00:03:49,697 They're watched by a huatsu, perched above the water. 37 00:04:00,553 --> 00:04:03,924 I would rather just chuck that rope, and go snorkling first. 38 00:04:16,844 --> 00:04:21,032 Mike finds a world of tangled roots and poor visibility. 39 00:04:33,173 --> 00:04:36,159 They're a lot of the fish we saw, 40 00:04:38,206 --> 00:04:40,526 I'm gonna go look in the trees. 41 00:04:41,934 --> 00:04:46,704 Every stream and river is different, and they never know what to expect. 42 00:04:52,657 --> 00:04:54,582 Very muddy. 43 00:04:54,760 --> 00:04:57,380 Not seen anything that we haven't seen before. 44 00:04:57,502 --> 00:04:59,483 They'll have to try somewhere else. 45 00:05:03,221 --> 00:05:08,686 Mike Pitts's team carried their equipment through the jungle, to the lake with the one-eyed cayman. 46 00:05:15,287 --> 00:05:17,803 There are two local guides on the expedition. 47 00:05:17,972 --> 00:05:22,292 Eduardo Gomez and Samuel Basilio. 48 00:05:22,405 --> 00:05:26,367 They belive the lake is their best change to find unusual fish. 49 00:05:28,978 --> 00:05:30,940 We check before, me and Eduardo 50 00:05:31,297 --> 00:05:33,982 and there is a big cayman over there 51 00:05:34,377 --> 00:05:36,744 I just heard an odd story about snakes here... 52 00:05:36,903 --> 00:05:41,307 Anaconda, but we never know, there's a lot of stories about it... 53 00:05:41,823 --> 00:05:44,828 We just wana be sure that nothing can happend to our divers. 54 00:05:45,663 --> 00:05:49,343 3 days ago, the guide saw something at the end of the lake. 55 00:05:49,437 --> 00:05:53,146 The anaconda ? The anaconda, it wasn't that big, about 6 meters. 56 00:05:53,240 --> 00:05:55,522 It's about 18 feet 57 00:05:56,526 --> 00:05:58,328 Big enough for me Yeah 58 00:05:58,591 --> 00:06:02,328 The team's filming permit doesn't allow them to carry a weapon. 59 00:06:02,545 --> 00:06:06,798 The have to rely on Eduardo's bow and arrow, in case the cayman strikes. 60 00:06:09,831 --> 00:06:13,634 On their way back to the boat, Mike and Kate take a shortcut 61 00:06:14,056 --> 00:06:15,831 Or so they think. 62 00:06:17,117 --> 00:06:20,234 Fallen trees are a common obstacle for locals, 63 00:06:20,309 --> 00:06:23,164 but for strangers, it's a bit of a puzzle. 64 00:06:30,488 --> 00:06:33,952 Well, let's think... is there any way around it ? 65 00:06:34,412 --> 00:06:36,619 We could lift that over 66 00:06:51,380 --> 00:06:53,380 You wanna lay it down ? It won't leak 67 00:06:56,337 --> 00:07:00,065 I just don't want gasoline in that boat We're gonna go over. 68 00:07:03,539 --> 00:07:06,966 Somebody say : I like his idea It's going in the water. 69 00:07:09,408 --> 00:07:12,309 I think that is a great idea. 70 00:07:13,502 --> 00:07:15,502 You got it ? 71 00:07:21,455 --> 00:07:24,216 Just make a decision... Yeah, I got it. 72 00:07:40,234 --> 00:07:44,833 Mike Pitts's team enter the lake rumored to have the one-eyed cayman. 73 00:07:47,497 --> 00:07:52,844 It's a big lake.... Yeah, lots of places an aligator can hide 74 00:07:58,304 --> 00:08:01,773 Eduardo makes baby cayman distress calls. 75 00:08:01,946 --> 00:08:05,280 If adults are here, they'll show themselves. 76 00:08:06,200 --> 00:08:10,206 I'm sure you guys are right, this is gonna be stuff in here. 77 00:08:13,579 --> 00:08:18,236 Local children gather, to watch the oddly dressed strangers. 78 00:08:20,172 --> 00:08:23,161 The circus has come to the jungle. 79 00:08:39,310 --> 00:08:43,929 A school of angel-fish drift by in this underwater jungle. 80 00:08:49,233 --> 00:08:53,832 Most tropical fish kept in captivity came from the Amazon jungle. 81 00:08:57,857 --> 00:09:04,162 Everybody's watching them, and a little boy is saying that he didn't know how these divers can swim with the big shoes 82 00:09:04,306 --> 00:09:07,582 and they can't belive that they can swim so fast and 83 00:09:07,735 --> 00:09:09,696 go under the trees like that. 84 00:09:09,837 --> 00:09:11,974 It's a big entertainment for them. 85 00:09:14,940 --> 00:09:17,687 Many creatures in these forest waters have evolved 86 00:09:17,722 --> 00:09:20,282 extraordinary colors to find one another. 87 00:09:32,645 --> 00:09:37,170 Mike Pitts finds a school of silvery amazon bricons (???). 88 00:09:37,545 --> 00:09:42,031 They glide past searching for fruit fallen from the trees overhead. 89 00:09:43,874 --> 00:09:46,927 Many fish here have developed unique behaviour. 90 00:09:47,608 --> 00:09:50,191 Mike discovers something remarkable. 91 00:09:50,590 --> 00:09:54,533 Two cyclide parents are protecting their home from newcomers... 92 00:09:54,639 --> 00:09:56,705 including cameramen. 93 00:10:03,890 --> 00:10:07,083 They've dug a deep hole in the sand with their mouths 94 00:10:07,177 --> 00:10:09,843 to make an underwater nursery for their babies. 95 00:10:16,170 --> 00:10:18,260 Beautiful fish. 96 00:10:18,539 --> 00:10:20,653 I wouldn't know, being a totally diferent-- 97 00:10:20,982 --> 00:10:22,766 sort of game, I think, because-- 98 00:10:23,236 --> 00:10:25,080 once that sun drops down, 99 00:10:25,197 --> 00:10:28,250 would get-- , I'm sure it's got to change a lot. 100 00:10:29,330 --> 00:10:31,056 so, I think we should be here. 101 00:10:31,209 --> 00:10:33,146 I've just talked with this kind seer 102 00:10:33,322 --> 00:10:36,880 and he said : be careful, because at night, everything comes out... 103 00:10:37,300 --> 00:10:40,494 and there is a cayman and snakes. 104 00:10:42,408 --> 00:10:45,390 But it's not only cayman that come out at night. 105 00:10:46,527 --> 00:10:50,460 When the boats moor for the evening, new creatures appear. 106 00:10:57,162 --> 00:10:58,888 Bats are everywhere. 107 00:11:00,321 --> 00:11:02,728 Some of them could be vampire bats, 108 00:11:02,787 --> 00:11:05,194 and the team may be at risk as they sleep. 109 00:11:07,508 --> 00:11:10,831 Vampire bats roost in hollow jungle trees. 110 00:11:10,948 --> 00:11:14,975 By night they fly the forest, feeding on monkeys and other mammals, 111 00:11:15,137 --> 00:11:18,178 piercing their skin with razor-sharp teeth. 112 00:11:22,077 --> 00:11:24,355 To find out if they are vampire bats, 113 00:11:24,411 --> 00:11:28,615 Kate puts up one of the expedition's nets in the jungle , by the boats. 114 00:11:30,879 --> 00:11:34,542 I'm just setting up this very , very fine net 115 00:11:36,632 --> 00:11:41,684 wich will trap any bat flying in this direction 116 00:11:41,731 --> 00:11:46,651 So this will allow us to actually get a good look at one 117 00:11:46,696 --> 00:11:50,747 without it being harmed. Right, I think that's ready. 118 00:11:50,935 --> 00:11:53,847 Let's turn the lights off and wait. 119 00:11:55,772 --> 00:11:58,062 Mike Pitts' team are ready to dive. 120 00:11:58,541 --> 00:12:02,674 They're hoping the night will reveal fish that can't be seen by day. 121 00:12:04,034 --> 00:12:08,073 Samuel and Eduardo keep an eye out for the one-eyed cayman. 122 00:12:08,871 --> 00:12:13,169 If we see cayman coming our way, I suppose we all 123 00:12:13,314 --> 00:12:17,141 cross our legs and hope the best, and keep filming. 124 00:12:18,466 --> 00:12:21,812 I think we'll get some stuff... so let's go for it. 125 00:12:31,545 --> 00:12:35,866 It this tangled watery forest, the divers risk getting stuck. 126 00:12:36,031 --> 00:12:38,884 And every log can hide the cayman. 127 00:12:39,916 --> 00:12:44,296 But it's worth the risk, as they capture behaviour never seen before. 128 00:12:45,399 --> 00:12:50,683 A transparent sand-knife fish, burrowing through the sediment, to escape predators. 129 00:12:52,031 --> 00:12:57,056 And a striped garr propels itself with the tiniest fin ligaments. 130 00:13:12,038 --> 00:13:15,525 Suddenly, Samuel confronts something in the water. 131 00:13:17,310 --> 00:13:20,996 It's a cayman, but certainly not the giant they were worried about. 132 00:13:21,628 --> 00:13:23,788 This is a red cayman. They don't grow big 133 00:13:24,047 --> 00:13:26,653 1.5 meters maximum, but 134 00:13:26,841 --> 00:13:31,033 This ones walk very deep in the forest, and are very aggresive 135 00:13:42,152 --> 00:13:44,840 While Samuel releases the red cayman 136 00:13:45,099 --> 00:13:48,328 the team steal an opportunity to film it. 137 00:13:50,943 --> 00:13:55,769 But it's one-eyed cousin could still be out there, in the dark. 138 00:13:58,681 --> 00:14:01,640 Back in the jungle, Kate checks her bat trap. 139 00:14:24,112 --> 00:14:25,404 Look at this 140 00:14:28,008 --> 00:14:29,652 that is 141 00:14:32,940 --> 00:14:35,088 a vampire bat. 142 00:14:35,309 --> 00:14:37,446 It's it funny how a creature 143 00:14:37,516 --> 00:14:42,741 as small as this, should express much fear. 144 00:14:43,399 --> 00:14:45,641 Pointed ears 145 00:14:45,799 --> 00:14:48,833 and this sort of ... tuckled nose 146 00:14:49,819 --> 00:14:53,013 and very elongated canine teeth 147 00:14:53,264 --> 00:14:55,068 that what does the damage 148 00:14:56,683 --> 00:14:58,919 I think we should let him go 149 00:14:59,105 --> 00:15:02,825 I hope to heavens he doesn't double back and bite for revenge. 150 00:15:16,482 --> 00:15:20,596 Next morning, as they head up river, they find a huge cayman. 151 00:15:20,812 --> 00:15:22,597 With just one eye. 152 00:15:22,907 --> 00:15:24,908 It wasn't a rumour after all. 153 00:15:25,582 --> 00:15:28,701 It had moved out of the lake, and into the main river. 154 00:15:28,897 --> 00:15:33,434 Perhaps it was more afraid of the divers, than they were of it. 155 00:15:39,315 --> 00:15:43,166 They film a wide variety of fish, in remote jungle lakes, 156 00:15:43,204 --> 00:15:45,899 but there's one creature they haven't seen. 157 00:15:46,076 --> 00:15:47,889 An electric eel. 158 00:15:47,974 --> 00:15:52,810 The expedition decide to fan out to find eel streams deep in the forest. 159 00:16:02,534 --> 00:16:06,808 Mike Pitts's team search for an isolated stream that may have eels. 160 00:16:07,059 --> 00:16:11,878 With no boat access, they're forced to carry their dive gear for two hours. 161 00:16:21,504 --> 00:16:27,469 Kate and Samuel are also hunting for suitable streams, in another part of this great rainforest. 162 00:16:32,004 --> 00:16:36,175 There's something about a tree of the size 163 00:16:36,325 --> 00:16:38,363 that kind of render you speechless. 164 00:16:39,099 --> 00:16:43,035 It makes you feel very small and very insignificant. 165 00:16:43,249 --> 00:16:44,808 Look at this , Samuel 166 00:16:46,527 --> 00:16:48,847 That's extraordinary. 167 00:16:49,531 --> 00:16:54,396 That's the most enormous ant. Be careful, that's very poisonous. 168 00:16:55,167 --> 00:16:58,096 Now, what would these ants normally prey on ? 169 00:16:58,162 --> 00:17:01,121 Other insects... 170 00:17:01,316 --> 00:17:04,077 Now you can feel... the smell. 171 00:17:04,481 --> 00:17:08,060 Yeah, it's a very strong, acidy smell. 172 00:17:10,701 --> 00:17:13,275 When they sting, it's painful 173 00:17:13,387 --> 00:17:15,454 for about 12 hours 174 00:17:17,443 --> 00:17:19,604 So it can be like wasp's sting 175 00:17:20,364 --> 00:17:23,624 Stronger... 6 or 10 times... like a scorpion. 176 00:17:24,167 --> 00:17:27,060 It's looking for something to bite and sting. 177 00:17:30,909 --> 00:17:33,427 But electric eels do more than sting, 178 00:17:33,474 --> 00:17:36,320 one zap can knock a diver unconscious. 179 00:17:36,901 --> 00:17:39,953 I've been told, if you're down there with-- 180 00:17:40,047 --> 00:17:42,067 with a hand grenade with the pin pulled out 181 00:17:42,206 --> 00:17:46,217 and you're thinking : that's gonna go off any second if I get too close 182 00:17:47,417 --> 00:17:51,071 If you're closer than a meter, it's gonna--- 183 00:17:51,475 --> 00:17:54,105 give you a very severe shock, and it's gonna hurt. 184 00:18:11,550 --> 00:18:14,452 Despite reports that this stream contains eels, 185 00:18:14,527 --> 00:18:16,631 they're having trouble finding them. 186 00:18:19,405 --> 00:18:23,097 Electric eels can look like sunken branches. 187 00:18:24,215 --> 00:18:26,572 But divers move cautiously. 188 00:18:30,007 --> 00:18:35,408 Mike is confronted by an angry pike-cyclid defending it's adolescent young below. 189 00:18:37,329 --> 00:18:41,208 Pike cyclids are a bit like humans in their parenting skills. 190 00:18:41,312 --> 00:18:44,571 Staying togheter to protect and even feed their family 191 00:18:44,626 --> 00:18:47,040 until they are nearly fully grown. 192 00:18:50,748 --> 00:18:55,388 They have the longest parental care of any fish in the world. 193 00:19:02,029 --> 00:19:05,918 We've had a look in this pool and there's no sign of any eels at all. 194 00:19:06,311 --> 00:19:08,340 But unfortunately, we seem to have lost the light, 195 00:19:08,762 --> 00:19:12,200 But... we'll come back. 196 00:19:21,391 --> 00:19:24,143 Kate's not having much luck finding streams, 197 00:19:24,186 --> 00:19:27,304 but Samuel has found an unlikely source of water. 198 00:19:33,246 --> 00:19:38,083 Well, this is a water vine, I'm just thristy, we walk for miles and miles 199 00:19:38,174 --> 00:19:42,795 and there's really good water, drinkable water 200 00:19:47,814 --> 00:19:48,744 Come here. 201 00:20:08,772 --> 00:20:10,369 This is not good one 202 00:20:13,267 --> 00:20:16,066 I thought it was fine, what's wrong with it ? 203 00:20:16,122 --> 00:20:18,217 Did you wanted to taste like beer ? 204 00:20:28,586 --> 00:20:31,892 Mike De Gruy and Eduardo set off through the jungle. 205 00:20:32,080 --> 00:20:36,195 They're heading for another forest stream, hoping to spot an electric eel. 206 00:20:41,652 --> 00:20:43,220 They must thread carefully, 207 00:20:43,286 --> 00:20:48,020 at night the forest floor is alive with snakes and other venomous animals. 208 00:20:51,265 --> 00:20:54,374 Reaching the stream , they begin their search. 209 00:21:17,005 --> 00:21:21,514 No sign of eels, but a chance to listen to the sounds of the jungle. 210 00:21:27,893 --> 00:21:32,430 That's quite amazing to me, there's so many different sounds going on 211 00:21:32,477 --> 00:21:34,863 when you sit quietly like this. 212 00:21:35,586 --> 00:21:39,568 But it also makes this wonderfuly rich 213 00:21:39,634 --> 00:21:41,701 texture, just sitting here 214 00:22:05,692 --> 00:22:09,973 Next morning the whole team joins forces, for one last big push 215 00:22:10,058 --> 00:22:13,167 to try and find the elusive electric eels. 216 00:22:24,212 --> 00:22:27,405 They think this overgrown stream is their best bet. 217 00:22:28,270 --> 00:22:30,017 This looks great. 218 00:22:32,291 --> 00:22:35,804 Obviously, these are one of--, the kings of the animal realm 219 00:22:35,861 --> 00:22:39,918 and they can kick out a 600 volt wallop 220 00:22:40,038 --> 00:22:44,509 when they're threatened, or when they want to kill something to eat. 221 00:22:45,049 --> 00:22:48,271 Anybody comes around,... Kapow ! 222 00:22:48,349 --> 00:22:49,927 and that pretty much does it. 223 00:22:50,077 --> 00:22:53,609 But before they can get started, the heavens open. 224 00:23:01,344 --> 00:23:03,918 Everything in the jungle takes shelter. 225 00:23:04,508 --> 00:23:07,101 This is one of the wettest places on Earth. 226 00:23:12,190 --> 00:23:15,375 Every year there's more than 2 meters of rainfall. 227 00:23:15,703 --> 00:23:18,625 And animals don't like it anymore than people. 228 00:23:26,541 --> 00:23:29,472 If the rain continues, it will muddy the waters, 229 00:23:29,547 --> 00:23:32,102 making finding eels impossible. 230 00:23:39,395 --> 00:23:43,255 But as quicly as the rain started, it stops. 231 00:23:51,789 --> 00:23:54,927 Kate gets into position, to try and spot an eel. 232 00:23:57,875 --> 00:24:01,801 They need to come to the surface to breathe every 15 minutes. 233 00:24:04,485 --> 00:24:08,740 Eduardo tries to attract one by mimicking a fish in distress. 234 00:24:09,576 --> 00:24:12,507 That's the eel, that's the eel. 235 00:24:15,484 --> 00:24:17,072 The eel's on the move. 236 00:24:43,897 --> 00:24:46,827 At first it seems they've missed their chance. 237 00:24:49,354 --> 00:24:51,167 The eels dissapeared. 238 00:24:55,522 --> 00:24:59,956 Everybody watches for the moment when the eel must come up for air. 239 00:25:35,113 --> 00:25:39,283 Finally they begin to capture an electric eel on camera. 240 00:25:44,281 --> 00:25:47,418 The divers edge closer and closer. 241 00:25:51,081 --> 00:25:55,167 If they move too suddenly, they risk being electrocuted. 242 00:26:08,522 --> 00:26:11,424 The divers are now just inches away 243 00:26:11,669 --> 00:26:14,327 yet the eel tolerates their presence. 244 00:26:23,935 --> 00:26:25,212 That's good. 245 00:26:25,511 --> 00:26:28,696 The most amazing thing you see rippling along you, 246 00:26:28,893 --> 00:26:33,024 and the time I'm sort of waiting for that 600 volts to go through me. 247 00:26:33,062 --> 00:26:35,664 Could you hear anything ? 248 00:26:35,746 --> 00:26:38,705 I couldn't hear anything 249 00:26:45,241 --> 00:26:48,942 They were very close, that was very dangerous. 250 00:26:56,402 --> 00:26:59,500 The team have taken unique images of the creatures 251 00:26:59,547 --> 00:27:02,966 that live in the waters of the deepest Amazon jungle. 252 00:27:04,300 --> 00:27:06,263 But there's one more task. 253 00:27:07,803 --> 00:27:11,382 The expeditions is heading towards its ultimate challenge. 254 00:27:12,319 --> 00:27:18,181 Legend has it that in the center of the Amazon there's an underwater trench more that 100 meters deep. 255 00:27:18,479 --> 00:27:22,499 I'm entering this with a small amount of trepidation. 256 00:27:23,204 --> 00:27:26,294 No one knows what creatures live there. 257 00:27:27,176 --> 00:27:29,562 Can't help but go into it. 258 00:27:30,022 --> 00:27:31,206 Careful. 259 00:27:31,647 --> 00:27:36,605 They will be the first people to enter the very deepest Amazon abyss. 260 00:27:41,088 --> 00:27:43,690 Tomorrow the team use an underwater robot 261 00:27:43,802 --> 00:27:48,133 in their search for live at the bottom of the world's greatest river. 262 00:27:50,553 --> 00:27:53,408 And as the expedition is reaching its climax 263 00:27:53,458 --> 00:27:58,905 they dive into the depths and find monsters hidden into the abyss.