(perky music) （活泼的音乐）
These images, taken less than five years ago, 这些照片是不到五年前拍摄的，
were the first ever recorded of that almost mythical 是有史以来第一次神话般的记载
inhabitant of the deep sea, the giant squid. 深海居民，巨型鱿鱼。
Its body is over twice the height of a man, 它的身高是男人的两倍，
its tentacles, four times that length. 它的触角，是长度的四倍。
No one before had seen it alive in its natural habitat. 以前没有人在它的自然栖息地中看到它活着。
Filming it was a historic triumph. 拍摄是历史性的胜利。
Now the scientists and cameramen who captured 现在捕获的科学家和摄影师
these amazing pictures, have teamed up once again 这些惊人的照片，再次合作
to explore still further the least known part of our planet. 进一步探索我们星球上鲜为人知的部分。
They're armed with the latest in deep sea technology, 他们配备了最新的深海技术，
and a new, highly sensitive camera, 还有一个新的高感光度的相机
that can record pictures in near total darkness. 可以在几乎完全黑暗的情况下录制照片。
The team is heading for a deep sea gorge 团队正驶向深海峡谷
off the coast of California, and this time 在加利福尼亚海岸外，这次
they hope to reveal another of the ocean's astonishments, 他们希望揭示海洋的另一种惊奇，
(charming music)(chimes ringing) （迷人的音乐）（铃声响）
creatures that glow in the deep. 在深处发光的生物。
It's so rich, it's so bright, 它是如此丰富，如此明亮，
so thick, so dense, it's so many 这么厚，那么密，那么多
different kinds of luminous displays. 不同种类的发光显示器。
And with them, the bizarre animals 和他们在一起，奇异的动物
that prey on them. 对他们的猎物。
This is a journey to the Earth's darkest frontier, 这是通往地球最黑暗边界的旅程，
(cheerfully busy music) （忙碌的音乐）
to try and unravel some of the secrets 尝试揭开一些秘密
of these extraordinary living lights. 这些非凡的生活灯。
On the west coast of California, 200 kilometers 在加州西海岸，200公里
south of San Francisco, lies Monterey Bay, 旧金山以南，蒙特利湾
world famous for the richness of its marine life. 世界以其丰富的海洋生物而闻名。
Cold Pacific currents bring an abundance 太平洋冷海流带来大量
of nutrients into the bay, which support 营养进入海湾，这支持
great numbers of sea mammals. 大量的海洋哺乳动物。
Whales. 鲸鱼。
Seals. 密封件。
And drifting among the floating kelp, sea otters, 在漂浮的海带，海獭之间漂流，
floating leisurely on their backs, 悠闲地漂浮在他们的背上，
cracking open shellfish on their stomachs. 在他们的肚子上裂开贝类。
(cheerful music) （欢快的音乐）
Beneath the surface of the sea, 在海面之下，
lies the largest underwater canyon 位于最大的水下峡谷
off the coast of North America, over 3000 meters deep, 在北美洲海岸之外，深达3000多米，
and rivaling in size the Grand Canyon. 在大小上可与大峡谷媲美。
The jagged walls of the Monterey Canyon 蒙特利峡谷的锯齿状墙壁
drop down steeply and create a unique underwater landscape. 陡降下来，创造出独特的水下景观。
The cold, sheltered waters provide a home 寒冷，避风的水提供了一个家
for many deep sea animals, and new species 适用于许多深海动物和新物种
are still continually being discovered. 仍在不断被发现。
Between 200 and a thousand meters deep, 在200至一千米深处
light gradually diminishes into blackness. 光线逐渐减弱为黑色。
This is the twilight zone, where little sunlight penetrates. 这是暮光区，几乎没有阳光穿透。
Many of the creatures that live here 住在这里的许多生物
produce their own light. 产生自己的光芒。
The expedition plans to dive down into this zone, 探险队计划潜入该区域，
guided by Dr. Bruce Robison, who's worked 布鲁斯·罗宾逊（Bruce Robison）博士的指导
in Monterey bay for many years, 在蒙特利湾已有很多年了
and is a world expert on deep sea animals. 并且是深海动物的世界专家。
We have been studying this place for 25 years. 我们已经在这个地方研究了25年。
And yet we still find new animals. 但是我们仍然发现新动物。
It is like treasure hunting, uh, 就像寻宝，嗯，
and you never know the nature of the treasure. 而且您永远不知道宝藏的性质。
Robison himself has made many discoveries 罗宾逊本人已取得许多发现
in Monterey Bay over the years, but he knows well 这些年来，他在蒙特利湾（Monterey Bay）工作，但他很了解
that exploration here has only just begun, 在这里的探索才刚刚开始，
and all kinds of astonishments may await. 各种惊奇都在等待。
Now the team will deploy his specially designed 现在，团队将部署他特别设计的
research submersible for their first exploratory dive. 进行首次探索性潜水的研究潜水。
(water bubbling) （冒泡）
It's un-manned, but it carries a camera 它无人驾驶，但带有相机
that sends pictures to the surface by a cable. 通过电缆将图片发送到地面。
Here we go. 开始了。
(amusingly inspiring music) （令人振奋的音乐）
A pair of inquisitive seals 一对好奇的印章
come to check out the strange machine. 来检查一下这台奇怪的机器。
It slowly descends into deeper waters. 它慢慢下降到更深的水域。
200 meters. 200米
Now, it's entered the twilight zone. 现在，它进入了暮光区。
So little light from the surface reaches these depths, 这么少的表面光到达这些深度，
that to our eyes it's virtually pitch black. 在我们看来，它几乎是黑色的。
It's time to turn on the sub's lights. 现在该打开潜水艇的灯了。
(pleasant music) （悦耳的音乐）
What is that? 那是什么？
It's a strange, ribbon-like worm. 这是一种奇怪的丝带状蠕虫。
We call 'em wiggle worms, and they are, 我们称它们为蠕虫蠕虫，它们是
they are really fun to watch because 他们真的很有趣，因为
they go through all of these contortions 他们经历了所有这些扭曲
and they make spirals, and circles, and loops. 它们会形成螺旋形，圆形和环形。
Well that's, they seem never to tie themselves 好吧，他们似乎从来没有捆绑自己
into a knot that they can't get out of. 陷入他们无法摆脱的困境。
And then, another strange creature. 然后，另一个奇怪的生物。
Oh it's a salp. 哦，这是胡扯。
Oh. 哦。
The salp is in fact not one individual, 抽筋实际上不是一个人，
but a chain of nearly 50 linked together. 但是将近50个链接在一起。
Sea salps are jelly-like filter feeders 海藻是果冻状的滤食器
that suck water in through their tubular mouths, 通过他们的管状嘴吸水，
and filter out tiny food particles. 并过滤掉微小的食物颗粒。
(eerie tense music) （怪异的时态音乐）
Something likes to-- 某样东西喜欢
DJ let's stop on that! DJ让我们停止吧！
Robison has spotted something else 罗宾逊发现了其他东西
in the darkness. 在黑暗中。
It's a kind of comb jelly called Beroe. 这是一种叫Beroe的梳子果冻。
(suspenseful music) （悬疑的音乐）
Rows of tiny beating hairs run 一排排细小的跳动的头发
the entire length of its body. 整个身体的长度
It's a magical sight, but it's not bioluminescence. 这是神奇的景象，但不是生物发光。
The shimmer is merely reflected from the light 微光只是被光反射
coming from the submersible. 来自潜水器
A small squid appears in the headlights. 前大灯中出现一个小乌贼。
It hangs in the water, waiting for prey 它挂在水中，等待猎物
to get caught on its long tentacles. 被其长长的触角抓住。
(brooding music)And it has a remarkably （沉思的音乐）它有一个显着的
large eye for such a small animal. 大眼睛这么小的动物。
Many creatures here have huge eyes. 这里的许多生物都有大眼睛。
They need to be able to follow prey, 他们需要能够追踪猎物，
or pick out the shape of a predator in the near-darkness, 或在近乎黑暗的地方挑选食肉动物的形状，
and there are plenty of those around. 周围有很多。
(tense music) （紧张的音乐）
In the open ocean, there is no place to hide. 在大海中，没有藏身之处。
The submersible is now halfway into the twilight zone. 潜水器现在位于暮光区的一半。
600 meters. 600米
They're hoping to see one 他们希望看到一个
still little known creature that lives 仍然鲜为人知的生物
at this particular depth. 在这个特定的深度。
(suspenseful music) （悬疑的音乐）
And here it is. 在这里。
A fish called the barreleye. 一条鱼叫做桶眼。
Its extraordinary head, is encased in 其非凡的头部被包裹在
a transparent dome so that you can look right inside. 一个透明的圆顶，这样您就可以看到里面。
Its eyes within their transparent shield, 它的眼睛在透明的防护罩内，
are enormous and point upwards. 巨大并且向上。
Robison first encountered this bizarre animal 罗宾逊（Robison）第一次遇到这种奇怪的动物
over a decade ago. 十多年前
At this point we were very, very excited, 在这一点上，我们非常非常兴奋，
because no one had ever seen one of these alive, before, 因为以前没有人见过其中之一
only specimens that had been caught in nets. 只有被网捕获的标本。
And as we watched it, we realized 当我们看着它时，我们意识到
that it looked very different than all 看起来与众不同
the specimens that had been collected by nets. 通过网收集的标本。
This, transparent dome, over the eyes, 这个透明的圆顶在眼睛上，
had never been seen before. 以前从未见过。
When you catch these in the nets, that's all scraped off. 当您将它们放在网中时，一切都被刮掉了。
It was an extraordinary discovery, 这是一个非凡的发现，
and the strange fish with the see-through head 还有带透明头的奇怪的鱼
would make the headlines. 会成为头条新闻。
While the transparent shield was thought to 虽然透明盾牌被认为是
protect the eyes, it was a puzzle as to how the fish 保护眼睛，这对鱼的生长是一个难题
could catch prey with its forward-facing mouth 可以用向前的嘴抓住猎物
if it can't see what it's feeding on. 如果看不到它在做什么。
It was a mystery that Robison would 罗宾逊会神秘
also solve some years later. 几年后也解决。
(serene music) （宁静的音乐）
Many of the creatures in the deep, 深处的许多生物
like the barreleye fish, defy imagination. 就像桶眼鱼一样，挑战想象力。
And here's another, the Black Sea Devil. 这是另一个，黑海魔鬼。
It's a kind of angler fish, with a bony rod 这是一种钓鱼者，有一根骨杆
and a luminous lure hanging from it 并悬挂着发光的诱惑
perched on the top of its head. 栖息在它的头顶上。
Every dive down to these depths brings new discoveries. 每次潜入这些深度都会带来新发现。
Go, where?Look at the black fish, oh! 去哪里？看黑鱼哦！
Oh, right there! 哦，就在那里！
Ooh! 哦！
Ooh. 哦
It's an excellent Dragon. 这是一条出色的龙。
See，Ooh! 看到，哦！
It's a deep sea dragonfish. 这是一条深海龙鱼。
I thought that was It's makes red luminescence. 我以为是它使红色发光。
Oh really?Yeah yeah! 真的吗？是的，是的！
The red spot just below the eye 眼睛下方的红点
is a photophore, a light emitting organ. 是一种荧光体，一种发光器官。
Even Robison has never seen it in action before. 甚至罗宾逊（Robison）都从未见过它在行动。
Looks better to me. 对我来说看起来更好。
Good lets do it. 好的，那就去做。
The sub has a special suction device 潜水艇具有特殊的抽吸装置
with which they might catch it. 他们可能会抓住它。
(groaning) （gro吟）
But it's not easy. 但这并不容易。
(mumbling) （喃喃自语）
Robison wants to bring it to the surface, 罗宾逊想把它浮出水面，
so that he can study it closely. 以便他可以仔细研究它。
Oh right in there!Oh you got it, got it! 哦，就在那里！哦，明白了！
All right!(mumbles) all right. 行！（嘟umble）好吧。
Now he'll have to act quickly. 现在，他必须迅速采取行动。
With the enormous pressure change, 随着巨大的压力变化，
the fish may not be able to produce its light for long. 鱼可能无法长时间发光。
The deep sea dragon is only 10 centimeters in length, 深海巨龙只有10厘米长，
but Robison is keen to find out how its 但罗宾逊（Robison）渴望找出其
light producing organ works. 发光器官的作品。
I think it's enough water in there, 我觉得里面足够水了
unless you feel like you want more. 除非您觉得自己想要更多。
No.Okay. 没有。好。
(mumbling) （喃喃自语）
To see the photophore in action, 要查看荧光粉的作用，
they'll need some highly specialized equipment. 他们将需要一些高度专业化的设备。
(patient music) （病人的音乐）
The red light emitted by the photophore 荧光体发出的红光
is too weak to register on an ordinary camera, 太弱了，无法在普通相机上注册，
but the team has developed one that is 但是团队开发了一种
600 times more sensitive. 敏感度提高了600倍。
Tested outside on a clear night, 在晴朗的夜晚在外面测试，
it produces an astonishingly sharp image of the stars, 它产生了令人惊讶的清晰的恒星图像，
so it should be able to detect the light 因此它应该能够检测到光线
produced by bioluminescent animals. 由生物发光动物产生。
The team have set up a filming tank 团队已经建立了一个摄影棚
in a dark room with water that's 在一个黑暗的房间里用水
kept at the same temperature as the deep ocean. 保持与深海相同的温度
With any luck, the dragonfish should behave 运气好的话，龙鱼应该表现得很好
relatively naturally in these conditions. 在这些条件下相对自然。
Under normal lights, the fascinating creature 在正常的灯光下，迷人的生物
lives up to its name. 不辜负它的名字。
It looks truly fearsome. 看起来真的很可怕。
And the two photophores are clearly visible under each eye. 而且每只眼睛下方都清晰可见两个荧光体。
But in the dark, the photophores light up. 但是在黑暗中，荧光灯会亮起来。
They glow in unison, one red and the other blue. 它们一致发光，一个红色，另一个蓝色。
And then, a surprise. 然后，一个惊喜。
(dramatic music)Whoo! （戏剧音乐）！
(mysterious music) （神秘的音乐）
This is something that no one has ever seen before. 这是前所未有的。
That's unexpected, and it's interesting. 那是出乎意料的，而且很有趣。
Ooh! 哦！
It's a spectacular display. 这是一个壮观的展示。
But what is its function? 但是它的功能是什么？
It could be to frighten off a predator, 可能是要吓跑捕食者
but no one knows. 但没人知道
We may not find the answer for many years yet. 我们可能很多年都找不到答案了。
Bioluminescence isn't limited to the ocean. 生物发光不仅限于海洋。
It's found in creatures on land, even in the air. 它是在陆地上的生物中发现的，甚至在空中也是如此。
Fireflies flash their lights to attract a mate. 萤火虫闪烁着灯光吸引伴侣。
Some woodland fungi glow bright green, 一些林地真菌会发出明亮的绿色，
attracting insects, maybe to distribute their spores. 吸引昆虫，也许散布孢子。
And at certain times of the year, 在一年中的某些时候
beetle larvae emerge from termite mounds 甲虫幼虫从白蚁丘中出来
and illuminate them like Christmas trees. 像圣诞树一样照亮它们
But in the deep ocean, 90% of the creatures produce light, 但是在深海中，有90％的生物会发光，
and we still know very little about why they do so. 而且我们仍然对他们为什么这么做一无所知。
The only way to find them in the pitch black 在漆黑中找到它们的唯一方法
is to shine our own lights on them. 是将我们自己的灯光照在他们身上。
But when we do that, it's impossible to see 但是当我们这样做时，看不到
the much weaker living lights that the 较弱的生活灯
animals themselves produce. 动物自己生产。
So studying the phenomenon is extremely difficult. 因此，研究该现象极为困难。
The mysteries are how they use it, 谜团是他们如何使用它，
what are they saying to each other with that light? 他们用这种光互相说什么？
The problem was that we never had a camera that we could 问题是我们从来没有一台可以
take down and use to record bioluminescence, 取下来并用来记录生物发光，
and that's why it was so important for me 这就是为什么它对我如此重要
to go down and see it with my own eyes. 下来用我自己的眼睛看
Now Robison and his team 现在罗宾逊和他的团队
have an opportunity to use the latest technology 有机会使用最新技术
to tackle the problem. 解决问题。
They'll be working from the Alucia, 他们将在Alucia工作，
the same research vessel that helped 同一个研究船帮助了
the film team find the giant squid. 电影团队找到了巨型鱿鱼。
(voices drowned out by ship noise) （语音被船舶噪音淹没）
Hi I'm Taylor. 嗨，我是泰勒。
Mark, pleased to meet you. 马克，很高兴见到你。
I've heard about you-- 我听说过你
The high-sensitivity camera system 高灵敏度摄像系统
that took two years to develop will now be really tested. 经过两年的开发，现在将经过真正的测试。
The crew carry out last minute checks 机组人员进行最后一分钟的检查
on the submersible before its dive 在潜水之前潜水
into the Monterey submarine canyon. 进入蒙特雷海底峡谷。
At the kind of depths at which they'll be operating, 在他们将要从事的工作深度上，
every precaution has to be taken. 必须采取一切预防措施。
The camera is carefully installed on a mount 相机已小心地安装在底座上
attached to the outside of the submersible. 连接到潜水器的外部。
At last everything is in place and they're ready to go. 终于一切就绪，他们准备出发了。
(machines humming) （机器嗡嗡声）
I'm excited like a boy, I, 我像一个男孩一样兴奋，我，
I now I'm gonna have a lot of fun. 我现在会很有趣。
Robison has spent a good part 罗宾逊花了很大一部分
of his career exploring the ocean depths, 在探索海洋深处的职业生涯中，
but he still gets excited before each dive. 但是每次潜水之前他仍然很兴奋。
Hi!Welcome! 嗨！欢迎！
Thank you (laughs)! 谢谢（笑）！
After his submersible, the Nadir, 潜入天底后，
has been lowered into the water, 被放到水里了
a second sub, the Deep Rover, is also launched. 第二个分支，即Deep Rover，也已启动。
(chattering) （ch不休）
Do I copy? 我要复制吗？
Yes. 是。
Good.Okay, here we go. 好。好的，我们开始。
(water bubbling)(water splashing) （冒泡）（泼水）
We're flooded. 我们被淹了。
And the dive begins. 然后潜水开始。
Their aim is to descend to a depth of 600 meters 他们的目标是下降到600米的深度
into the middle of the twilight zone. 进入暮光区的中间。
(mumbling) （喃喃自语）
Soon the light levels start to fall, 不久，光线水平开始下降，
and they enter a dark, blue world. 他们进入了一个黑暗的蓝色世界。
(eerie suspenseful music) （怪异的悬疑音乐）
Control control, the Nadir's 控制控制，天底
at 200 meters, descending over. 在200米处下降。
Something off the front. 前面有东西。
Yeah, there's quite a long one there, isn't it? 是的，那儿有很多，不是吗？
Yes. 是。
This may look like a piece of string, 这看起来像一条线，
but in fact it's a huge colony 但实际上这是一个巨大的殖民地
of living creatures linked together. 的生物联系在一起。
They're called siphonophores, 他们被称为虹吸虫，
and are relatives of the jellyfish. 是水母的亲戚
Siphonophores are very unusual creatures. 虹吸管是非常不寻常的生物。
They are a colony of individuals 他们是个人的殖民地
all connected to one another. 全部相互连接。
We have found individuals that were 40 meters long, 我们发现有人长40米，
longer than a blue whale, the longest creature on Earth. 比蓝鲸（地球上最长的生物）更长。
The individuals of the front contract 前期合同的个人
and expel water simultaneously, 同时排出水
so slowly moving the colony forward by jet propulsion. 如此缓慢地通过喷射推进使殖民地向前移动。
The rest of the chain extend hair-like tentacles 链的其余部分延伸成类似头发的触角
to catch passing prey. 赶上掠过的猎物。
There may be hundreds, if not thousands 可能有数百甚至数千
of individuals in a single chain. 单链中的个人数量。
Each one performs a particular function 每个人执行特定的功能
and occupies a particular place within the colony, 并在殖民地中占据特定位置，
much like the organs in our bodies. 很像我们体内的器官。
This super-colony works as a team. 这个超级殖民地是一个团队。
But how individuals communicate with each other, 但是个人之间如何交流，
and coordinate their movements is still a mystery. 协调他们的动作仍然是个谜。
Ooh, there's Colobonema. 哦，有同事。
Very, very pretty medusa. 非常非常漂亮的美杜莎。
Colobonema is a small jellyfish 疣状小水母
just five centimeters long, 只有五厘米长，
but it's a strong swimmer, and as the sub 但它是一个坚强的游泳者，
gets closer, it puts on a turn of speed. 越来越近，它加快了速度。
See, he just dropped his tentacles. 看，他只是掉下了触手。
Oh! 哦!
(machine whirring)Cool, you got it! （机器呼呼声）酷，知道了！
The small jelly sheds his tentacles on purpose. 小果冻故意撒下了触角。
It's a ploy to confuse predators. 欺骗掠食者是一种欺骗。
While our eyes follow the discarded appendages, 当我们的眼睛跟随被丢弃的附属物时，
Colobonema makes its escape. Colobonema逃脱了。
Control control, Nadir passing 控制控制，最低点通过
570 meters, descending over. 570米，下降。
The sub is nearing the 600 meter mark. 潜水艇已接近600米标记。
Oop, stop Andy!Over. 糟糕，停止安迪！结束。
See that Yeah, yeah. 看到 是的，是的。
(mechanical whirring) （机械呼ir）
Go slowly. 慢慢走。
That's an owlfish. 那是一条fish鱼。
It seems to be scared 好像很害怕
of the subs bright lights. 潜水艇的明亮灯光。
(mechanical whirring) （机械呼ir）
(clicking) （点击）
So the crew decide to switch them off. 因此，机组人员决定将其关闭。
They turn on a much weaker light, 他们打开弱得多的灯，
adjust the sensitivity of the camera, 调整相机的灵敏度，
and the fish comes into view again. 鱼再次出现。
Wow.Nice. 哇。不错。
Wow! 哇！
Like many deep sea creatures, 像许多深海生物一样，
the owlfish has huge eyes, which can detect 猫头鹰鱼的眼睛很大，可以察觉
the faintest trace of light, 最微弱的光迹
including the living light of its prey. 包括猎物的生命之光。
The fish uses the very minimum of energy, 鱼消耗的能量极小，
and simply hangs in the water, waiting for prey to swim by. 只是挂在水中，等待猎物游过。
Having a camera with this sensitivity is 拥有这种灵敏度的相机是
very exciting, because of the things it may reveal, 非常令人兴奋，因为它可能会揭示出一些东西，
things that we don't even know are here, 我们什至不知道的东西在这里，
that may appear for the first time. 可能是第一次出现。
Again, because we can work with very low light. 同样，因为我们可以在非常低的光线下工作。
Aww! !！
Oh and here's a, here's... 哦，这是一个，这里是...
It's the Beroe comb jelly again. 又是贝罗梳子果冻。
In the submersible's headlights, 在潜水器的头灯中
it shimmers with refracted colors. 它闪烁着折射的色彩。
But what would it look like if the lights were off? 但是，如果灯熄灭会是什么样呢？
Sure. 当然。
(clicking) （点击）
(eerie music) （怪异的音乐）
In the dark, Beroe produces 在黑暗中，贝罗产生了
the most astonishing intricate pattern of light, 最惊人的复杂光图案
all along its body. 一直到它的身体
This is bioluminescence. 这是生物发光。
Ooh, look at that! 哦，看那个！
Ew!This here! w！这里！
Yeah!That's a big one. 是的!那是很大的。
Holy cow! 天啊！
What a beauty! 真漂亮！
The striking red torpedo is 醒目的红色鱼雷是
a Periphylla jellyfish. 一年生水母。
It's a voracious hunter that uses stiff tentacles 这是一个使用僵硬的触角的贪婪的猎人
to catch its prey. 抓住它的猎物。
(tense music) （紧张的音乐）
But it also has another trick up its sleeve. 但它也有另一招。
That's a very luminescent animal, 那是一种非常发光的动物，
when it is stimulated. 当它被刺激时。
Okay. 好的。
So as not to scare it, 为了不怕
they switch to a red light, which the jelly can't detect. 它们会变成果冻无法检测到的红灯。
(eerie serene music) （恐怖的宁静音乐）
(chimes ringing) （铃声响）
And then it starts a totally different performance. 然后开始完全不同的性能。
It starts to eject the tiny blue particles. 它开始弹出微小的蓝色颗粒。
They drift away, leaving a trail of twinkling blue lights. 他们渐行渐远，留下了闪烁的蓝光。
What is going on? 到底是怎么回事？
No, stay away, stay away, 不，远离我，远离我，
stay away, stay away! 远离，远离！
Aah! 啊！
The crew try to keep away from the jelly 机组人员尽量远离果冻
but the currents created by 但是电流是由
the submersible have disturbed it. 潜水器打扰了它。
It's response is to eject its living lights. 它的反应是弹出其生存灯。
(eerie tense music) （怪异的时态音乐）
It seems that if threatened, Periphylla tries 似乎如果受到威胁，百里香会尝试
to trick a predator into following the glowing trail, 诱使掠食者跟随发光的轨迹，
and so enable the jelly itself to escape. 从而使果冻本身能够逃脱。
Ooh, there's a Tomopterid worm. 哦，那里有线虫蠕虫。
Yes. 是。
The transparent worm 透明蠕虫
seems to crawl through the water with its bristly legs. 似乎以其明亮的双腿在水中爬行。
(chimes ringing)But when disturbed （铃声响）但是当被打扰时
it also ejects glowing lights. 它还会弹出发光的灯。
(eerie tense music)(chimes ringing) （怪异的时态音乐）（铃声响）
Many other bioluminescent creatures make an appearance, 还有许多其他生物发光生物出现，
and the crew are able to capture 乘员组就可以捕获
their displays with the new camera. 使用新相机显示。
Living in this twilight zone depth, right, 住在这个暮光之城的深处，对，
which is very challenging for the animals 对动物来说非常具有挑战性
that choose to live here, because there are no 选择住在这里，因为没有
rocks or trees or holes in the ground 岩石，树木或地面上的洞
where animals can hide. 动物可以藏身的地方。
It's a truly three-dimensional space without 这是一个真正的三维空间，没有
boundaries or borders.(chimes ringing) 边界或边界。（铃声响）
Light is an extremely 光是一种极端
important way that the animals deal 动物交易的重要方式
with the challenges of living here. 生活在这里的挑战。
(eerie tense music)(chimes ringing) （怪异的时态音乐）（铃声响）
The team have been underwater 团队已经在水下
for nearly eight hours. 持续了将近八个小时。
It's time to come up to the surface. 是时候浮出水面了。
(water bubbling) （冒泡）
(water splashing)(water bubbling) （泼水）（冒泡）
It's two days into the expedition 探险已经两天了
and they're awaiting the arrival of a visitor. 他们正在等待访客的到来。
Dr. Edith Widder is a world expert on bioluminescence. Edith Widder博士是生物发光领域的全球专家。
Don't step on that!Yep, thank you! 不要踩到那！是的，谢谢！
Well done, how are you?Good. 干得好，你好吗？好。
She's worked with Robison 她曾与罗宾逊（Robison）合作
many times over the years. 这些年来很多次。
Oh you believe this? 哦，你相信这个吗？
Yes. 是。
Anyway,Yeah! 无论如何，是的!
oh, I'm glad you're here. 哦，很高兴你在这里。
(laughs) I'm glad you,I need all the help （笑）我很高兴见到你,我需要所有帮助
I can get!Oh yeah (laughs)? 我可以得到！哦，是的（笑）？
Widder was part of 威德曾经是
the giant squid expedition in 2012. 2012年的巨型鱿鱼探险。
She had developed an electric jellyfish 她开发了一种电水母
that emitted flashing lights similar 发出类似的闪光
to that used by deep sea creatures. 与深海生物使用的生物一样。
That had helped the team to attract 那帮助球队吸引了
a giant squid so that they could film it 一个巨大的鱿鱼，以便他们可以拍摄
alive for the very first time. 第一次活着。
(astonished gasping) （吃惊地喘着粗气）
Now Widder has brought along some new gadgets 现在，Widder带来了一些新产品
that she's developed specially for this expedition. 她是专门为这次探险而开发的。
This is one of them. 这就是其中之一。
She calls it a a Splat Screen. 她称其为Splat屏幕。
If deep sea creatures unknowingly swim into it, 如果深海生物在不知不觉中游进去，
she thinks they'll produce bioluminescence, 她认为它们会产生生物发光，
and their special camera should then be able to film it. 然后他们的专用相机应该可以拍摄它。
Oh I think it's gonna be an incredible dive. 哦，我认为这将是一次令人难以置信的潜水。
I can't wait to try out the new Splat Screen, 我等不及要尝试新的Splat屏幕了，
and so, to be able to see now 因此，现在可以看到
what this camera's gonna be able to see, 这台摄影机将能看到什么
because in those early days I didn't know 因为在那些早期我不知道
what I was seeing, and over time I've gotten 我所看到的，随着时间的流逝，
so I can identify a lot of the animals 所以我可以识别很多动物
by the types of flashes they produce. 根据它们产生的闪光类型。
But I thank that's gonna be even easier to do 但我感谢那会变得更容易
now with this camera system. 现在有了这个摄像头系统。
Widder will work from 威德将在
the second submersible, the Deep Rover. 第二个潜水器，即“深漫游者”。
And Robison gets ready to head down in the Nadir again. 罗比森准备再次前往天底。
On this dive they're planning to descend 他们打算在这次潜水中下降
right to the ocean floor. 对海底。
Control Rover, my depth, 770 meters, 控制流动站，我的深度770米，
on bottom, over. 在底部，结束。
After an hour, they have made it. 一个小时后，他们做到了。
(mysterious music) （神秘的音乐）
The sea floor is thronged with fish. 海底到处都是鱼。
Nutrients falling to the bottom, 营养下降到最低点，
and accumulating there, attract a great variety of animals. 并在那里聚集，吸引了各种各样的动物。
This, small little sea pen, you see it? 这个，小小的海笔，你看到了吗？
Yeah that's, oh that's a ri-my-a. 是的，哦，是我。
(tense music) （紧张的音乐）
Sea pens are (mumbles) creatures 海笔是（含糊）的生物
that anchor themselves to the sea floor. 使自己锚定在海底。
They prefer deep waters, where they're 他们喜欢深水，
less likely to be uprooted by ocean currents. 不太可能被洋流连根拔起。
(mechanical whining) （机械抱怨）
But they're not safe from 但是他们不安全
the robotic arm of the submersible. 潜水器的机械臂。
(chimes ringing) （铃声响）
And when touched, the glow. 当被触摸时，就会发光。
(eerie music)(chimes ringing) （怪异的音乐）（铃声响）
This is a different kind of sea pen. 这是另一种海笔。
It produces a blue, pulsating light. 它产生蓝色的脉动光。
(chimes ringing) （铃声响）
Widder is keen to try out the new Splat Screen Widder渴望尝试新的Splat屏幕
to see if that will stimulate animals 看看是否会刺激动物
to glow that they might otherwise miss. 发光，否则他们可能会错过。
All right, are you ready for the screen? 好吧，您准备好了要放屏幕吗？
Yep. 是的
(mechanical whirring) （机械呼ir）
Okay, all lights off. 好吧，所有的灯都熄灭。
All lights off. 所有灯灭。
(clicking) （点击）
(suspenseful music) （悬疑的音乐）
As their eyes adjust to the darkness, 当他们的眼睛适应黑暗时，
they see the first faint glow. 他们看到第一缕微弱的光芒。
It's a jellyfish, and as it comes closer 它是一个水母，而且随着它越来越近
Widder is able to identify it. Widder能够识别它。
That's a (mumbles) jelly. 那是（含糊的）果冻。
I think that's Atolla. 我认为是Atolla。
Yeah it is, it's Atolla. 是的，是Atolla。
And the ultra-sensitive camera 和超灵敏相机
is able to record its complex light display. 能够记录其复杂的灯光显示。
(eerie music)(chimes ringing) （怪异的音乐）（铃声响）
As it touches the screen, it produces 触摸屏幕时，会产生
a spectacular strobing of blue light. 壮观的蓝光频闪。
Widder suspects that the function of this display 威德怀疑该显示器的功能
isn't to scare off the enemy, 并不是要吓退敌人，
it may convey another message. 它可能传达另一条消息。
Now she brings her electric jellyfish into action. 现在，她将水母带入水中。
(water bubbling) （冒泡）
It's programmed to emit the same pattern of light as Atolla. 它被编程为发出与Atolla相同的光图案。
(energetic orchestra music) （充满活力的乐团音乐）
A low light camera reveals that the blue flashes 低照度相机显示蓝色闪烁
quickly attract large fish. 迅速吸引大鱼。
And a gigantic deep sea predator. 还有一个巨大的深海捕食者。
A Pacific sleeper shark, nearly three meters long. 一条太平洋睡鲨，长近三米。
It's not a threat to the jelly, 这不是对果冻的威胁，
it seems to be preying on the smaller fish, 似乎是在捕食较小的鱼，
that are in fact the jelly's real enemies. 实际上是果冻的真正敌人。
So the jelly's flashing lights may be acting 所以果冻的闪光灯可能正在起作用
as a call for help, a kind of living burglar alarm. 作为求救电话，一种实时的防盗警报器。
It has this remarkable ability to produce 它具有卓越的生产能力
this pinwheel of light, and so clearly, 这个风车，如此明显，
if it was a scream for help, then you would think 如果那是求救的尖叫声，那么您会认为
that that pattern should be 该模式应该是
very attractive to large predators. 对大型食肉动物非常有吸引力。
It's an intriguing idea. 这是一个有趣的想法。
In the meantime, Bruce Robison is in the Nadir 同时，布鲁斯·罗宾逊（Bruce Robison）在天底
and making his own discoveries. 并做出自己的发现。
Rover Nadir, over.Ooh, stop Andy. 罗孚·纳迪尔（Rover Nadir）过去了。哦，停止安迪。
Over.See that 结束。看到
Yeah, yeah. 是啊。
This is a viper fish, a fearsome predator, 这是毒蛇鱼，可怕的捕食者，
and it too creates light. 它也创造光。
You see those spots along his belly, 你看到他肚子上的那些斑点，
Oh yeah.those are 哦耶。这些是
bioluminescence organs. 生物发光器官。
Oh yeah. 哦耶。
Rows of small photophores run along 一排排的小荧光粉沿着
the length of its underbelly, and produce blue light. 其腹部的长度，并产生蓝光。
(eerie tense music) （怪异的时态音乐）
From below, the fish lights up like an airport runway. 鱼从下面像机场跑道一样照亮。
Interestingly, many deep sea creatures 有趣的是，许多深海生物
generate light on their undersides. 在他们的下面发光。
Why should this be so? 为什么会这样呢？
It seems that the lights may actually help 看来，灯光实际上可能会有所帮助
to camouflage the animals from 伪装动物
predators lurking beneath them. 潜伏在它们下面的掠食者。
One creature that uses its lights to this effect 一个利用光来达到这种效果的生物
is the firefly squid. 是萤火虫乌贼。
(cheerfully busy music) （忙碌的音乐）
Hundreds of tiny photophores illuminate their bodies. 数以百计的微型荧光灯照亮了他们的身体。
Why don't these bright lights attract predators? 这些明亮的灯光为什么不吸引掠食者？
A small amount of light from the surface 表面有少量光
filters down into the twilight zone, 过滤到暮光区
so from below, a black silhouette would be clearly visible, 因此从下面看，黑色轮廓清晰可见，
and make an easy target for deep sea hunters. 并成为深海猎人的简单目标。
A predator from down below, looking for a meal, 一名食肉动物从下面向下寻找食物，
might see the body of an animal silhouetted 可能会看到动物的身影
against the lighted waters above, 对着上面点燃的水，
and would use that silhouette as a guide 并会以该轮廓为指导
to strike and feed on. 罢工和继续前进。
But the squid's lights prevent that 但是鱿鱼的灯阻止了
by breaking up its silhouette. 通过打破它的轮廓。
Through a thick layer of water this effect 通过厚厚的水这种效果
is even more pronounced. 更加明显。
And by controlling the intensity of its own light, 通过控制自己的光线强度，
to match the background, the animal blends 匹配背景，动物融为一体
into its surroundings. 进入周围。
So contradictory though it may sound, 听起来很矛盾，
light in fact conceals. 光线实际上掩盖了。
Many animals who live in this part of the ocean 生活在海洋这一部分的许多动物
eliminate that threat by producing light 通过发光消除威胁
along their bellies and erasing their shadow 沿着他们的肚子，消除阴影
so that they cannot be seen. 这样就看不到它们。
But there is one predator 但是有一个掠食者
that's not deceived by this trick, the barreleye. 桶眼不被这个把戏所欺骗。
It has evolved its own special hunting technique. 它发展了自己的特殊狩猎技术。
It hangs almost motionless in the water, 它几乎静止不动地挂在水中，
with its large eyes directed upwards, 大眼睛向上
searching for the faint silhouettes of prey overhead. 寻找猎物开销微弱的轮廓。
The eyes are green, because they contain 眼睛是绿色的，因为它们包含
a pigment that screens out bioluminescence 屏蔽生物发光的颜料
that other animals use to hide with. 其他动物用来躲藏的东西
So it's not fooled by the counter-illumination 因此，它不会被反照明所欺骗
of that bioluminescence. 生物发光。
Although no one has ever seen how 虽然没有人见过
the barreleye hunts, Robison has studied the animal 桶眼狩猎，罗宾逊研究了动物
closely, and come up with a theory. 紧密结合，并提出一个理论。
It feeds on small krill and other plankton. 它以小磷虾和其他浮游生物为食。
Some prey try to hide by using bioluminescence. 一些猎物试图利用生物发光来躲藏。
But seen through the eyes of the barreleye, 但从桶形眼睛的眼睛看，
the deception does not work. 欺骗是行不通的。
The hunter can clearly see its prey. 猎人可以清楚地看到它的猎物。
(suspenseful music) （悬疑的音乐）
The barreleye approaches stealthily from below, 桶形眼睛从下面偷偷靠近，
and as it rises to the level of its prey, 当它上升到猎物的高度时，
it rotates it's eyes. 它旋转它的眼睛。
(dramatic music) （戏剧音乐）
Eternal darkness has caused creatures that live here 永恒的黑暗导致生活在这里的生物
to evolve all kinds of shapes and strategies 发展各种形状和策略
that are utterly different from those we use ourselves, 与我们自己使用的完全不同
and one of the key elements is the ability to create light. 关键要素之一是创造光的能力。
(brooding music) （沉思的音乐）
(chimes ringing) （铃声响）
They just seem strange to us, 他们对我们来说似乎很奇怪，
because we are so accustomed 因为我们很习惯
to living in a very different world. 生活在一个非常不同的世界。
Some are virtually blind, 有些实际上是盲目的，
and rely on other senses to catch their food. 并依靠其他感官来获取食物。
While others have particularly large eyes that 而其他人的眼睛特别大
enable them to see in the dimmest of light. 使他们能够在最暗的光线下看到。
They've all evolved their own ways 他们都发展了自己的方式
of dealing with the darkness, 处理黑暗，
but most of them us bioluminescence in some way or other. 但其中大多数采用某种方式进行生物发光。
So perhaps it's not surprising, 所以也许不足为奇
that nature's greatest light show 大自然最伟大的灯光秀
happens in the one place where there is continuous darkness. 发生在一个连续黑暗的地方。
(serene music) （宁静的音乐）
Control control Rover, 控制控制流动站，
passing 300 meters, descending (mumbles). 经过300米，下降（喃喃自语）。
Deep Rover is slowly heading upwards, Deep Rover正在慢慢向上行驶，
with the splat screen still extended. splat屏幕仍会扩展。
It lights up with the glow of small creatures 小动物的光芒照亮了它
that come into contact with the net. 与网接触。
By freezing the image from the camera, 通过冻结相机中的图像，
it's possible to identify some of the animals 可以识别一些动物
that are creating the light. 创造光。
These are copepods, small crustaceans 这些是co足类，小型甲壳类动物
just a few millimeters long. 只有几毫米长。
When threatened, they can discharge a bioluminescent liquid. 当受到威胁时，它们可以排出生物发光液体。
They're one of the most abundant creatures in the ocean, 它们是海洋中最丰富的生物之一
and the main source of food for many fish. 也是许多鱼类的主要食物来源。
(relaxing music) （放松音乐）
These small creatures may provide a clue 这些小动物可能会提供线索
to understanding why bioluminescence is so 了解为什么生物发光如此
widespread in the deep ocean. 分布在深海。
It's long been a mystery as to how 长期以来一直是一个谜
deep sea animals produce light, 深海动物会发光
but science is now beginning to find some of the answers. 但是科学现在开始找到一些答案。
Most deep sea animals produce bioluminescence 大多数深海动物产生生物发光
with a molecule called coelenterazine. 带有腔肠素的分子。
When this reacts with certain enzymes in their bodies, 当它与体内某些酶反应时，
it produces light. 它产生光。
So bioluminescence may seem like magic, 所以生物发光看起来像魔术，
but in fact is the result of a 但实际上是
straight-forward chemical reaction. 直接化学反应。
But there is nonetheless, one mystery. 但是，还有一个谜。
Most deep sea animals themselves 最深的海洋动物本身
can not produce this light emitting substance, 不能产生这种发光物质，
so where does it come from? 那么它是从哪里来的呢？
A Japanese researcher, Yuichi Oba, 日本研究员大雄雄一
may have found the answer. 可能找到了答案。
Oba has been studying deep sea copepods, 欧巴一直在研究深海co足类动物，
and he's discovered that one particular species 他发现一种特定的物种
is able to make coelenterazine within its body. 能够在体内制造腔肠素。
It's called Metridia pacifica. 叫做Metridia pacifica。
We still don't know how many others can do the same, 我们仍然不知道有多少其他人可以做同样的事情，
but it's a clue as to where the luminous molecule 但这是关于发光分子在哪里的线索
could have come from. 可能来自。
But how is it that the same molecule is also found 但是怎么也发现了相同的分子
in many other deep sea creatures? 在其他许多深海生物中吗？
Well, it appears that it spread through the food chain. 好吧，它似乎在整个食物链中传播了。
Copepods are the main source of food pe足类是食物的主要来源
for many shrimps and small fish, 对于许多虾和小鱼，
so the coelenterazine molecule will be 所以腔肠素分子将是
transferred into the bodies of their predators. 转移到他们掠食者的尸体中。
The shrimp in turn may pass on 虾又会转嫁
the molecule to their predators, 捕食者的分子，
squid and larger fish, which in turn 鱿鱼和大鱼，反过来
are eaten by even larger hunters. 被更大的猎人吃掉。
So the light emitting molecule could have spread 所以发光分子可能已经扩散了
from prey to predator and so through the whole 从猎物到捕食者，乃至整个
community of deep sea animals. 深海动物社区。
It's an extraordinary thought, 这是一个不寻常的想法，
that the living light produced by some of 某些人产生的生命之光
the smallest creatures in the sea, could be the basis for 海洋中最小的生物可能是
the incredible light shows in the ocean. 海洋中令人难以置信的灯光秀。
The precise function of bioluminescence may vary. 生物发光的精确功能可能会有所不同。
Some use it to intimidate their enemies. 有些人用它来威吓他们的敌人。
Others to hide from predators or to call for help. 其他人可以躲避捕食者或寻求帮助。
But the meaning of many of their messages 但是他们许多信息的含义
still remains a mystery. 仍然是一个谜。
(serene music) （宁静的音乐）
As the expedition draws to a close, 随着远征即将结束，
the team prepare for one last dive to watch 团队准备最后一次潜水观看
a particularly spectacular event. 一个特别壮观的事件。
It happens every night as the sun drops below the horizon. 每天晚上，当太阳降到地平线以下时，就会发生这种情况。
It's a time when vast numbers of deep sea creatures 这是大量深海生物的时代
rise towards the surface. 向表面上升。
The team are hoping to film the spectacle 团队希望拍摄奇观
and the light show that goes with it, 和随之而来的灯光秀，
and to do that properly they will deploy both submersibles. 为了做到这一点，他们将部署两个潜水器。
When we get up to 200 meters or maybe 100, 当我们上升到200米或100米时，
we should coordinate and if there is a thick layer 我们应该协调，如果有厚层
of luminescence, we should try 发光，我们应该尝试
to shoot each other as we drive through it. 在我们开车穿越时互相射击。
The submersibles are launched 潜艇发射
while there's still light. 虽然还有阳光。
(water splashing) （泼水）
As they descend deeper, and night falls, 随着他们深入，夜幕降临，
they once more enter the world of darkness. 他们再次进入黑暗的世界。
And it's not long before they're 不久之后
traveling through a large swarm of krill. 穿越一大群磷虾。
Not bad, just going up. 不错，只是上升。
The small crustaceans are on 小甲壳动物在
their daily migration up to the surface, 他们每天迁移到表面，
where they will feed on plankton. 他们将以浮游生物为食。
Others have also been hiding in deep waters 其他人也躲在深水里
to avoid predators. 避免掠食者。
Now there's a mass migration of animals up 现在有大量动物迁徙
towards the surface, where food is more abundant. 朝向食物丰富的地表。
But this vast migration attracts some bigger hunters. 但是这种大规模的迁徙吸引了一些更大的猎人。
It's an electric torpedo ray. 这是一条电鱼雷射线。
They usually live down near the bottom, 他们通常住在底部附近
but at night it comes up to feed. 但是到了晚上，
It's 5:30 p.m., and the sun has set. 现在是下午5:30，太阳已经落山了。
The submersibles are in position. 潜水器就位。
Control control, the Nadia's at 200 meters 控制控制，Nadia在200米处
with Rover, over. 与Rover结束。
The submersibles are hanging motionless 潜水器静止不动地悬挂
at a depth of 200 meters, but to really see 在200米的深度，但要真正看到
what they've come for, they need to turn off all the lights. 他们追求什么，就需要关掉所有的灯。
Let's give it a try. 试一试吧。
(clicking) （点击）
(tense music) （紧张的音乐）
The first glowing lights appear, 第一个发光的灯出现，
and the show begins. 节目开始了。
(serene music) （宁静的音乐）
With every passing minute, the firework display gets bigger. 每过一分钟，烟火显示就会变大。
The subs are now surrounded by light on all sides. 现在，潜水艇的四周都被光包围着。
Ooh, ooh!Yeah! 哦，哦！是的！
Aw!Oh yeah! w！哦，是的！
Pretty good, pretty good. 很好，很好。
Yeah. 是的
Wave after wave of living lights 一波又一波的生活灯
well up from the deep. 从深处开始。
So, copepods, and krill, there's na-nomia, 所以，co足类和磷虾，有个名词，
there's a suggestive (mumbles). 有暗示（喃喃自语）。
Millions of glowing marine creatures 数百万发光的海洋生物
continue to appear, and amongst them could well be 继续出现，其中很可能是
other strange life forms that we've not yet encountered. 我们还没有遇到过的其他奇怪的生命形式。
The underwater night sky is now illuminated 水下夜空照亮了
by hundreds of shooting stars. 由数百名流星。
The show continues for over two hours, 节目持续了两个多小时，
and when they come back up to the surface, 当它们回到表面时，
the scientists are ecstatic. 科学家们欣喜若狂。
Look at that!Yeah! 看那个！是的！
It is the Milky Way! 这是银河系！
But it's also scientifically very interesting 但这在科学上也很有趣
that you can actually see the different colors. 您实际上可以看到不同的颜色。
But scientists have yet to discover 但是科学家尚未发现
the meaning of many of these living lights, 这些活灯的许多含义
and how and why they are produced. 以及它们的生产方式和原因。
Most of the animals in this vast, vast volume make light, 在如此巨大的体积中，大多数动物都会发光，
and that much of it we still don't understand 而且很多我们还是不明白
what it's used for. 它的用途是什么。
That's a huge mystery. 那是一个巨大的谜。
We have only begun to explore. 我们才刚刚开始探索。
And, we continue to find new discoveries 并且，我们继续寻找新发现
every time we go into the ocean, so yes, 每次我们进入海洋时，是的，
we've only begun to find out what's down there, 我们才刚刚开始发现那里到底是什么，
to learn how these pieces of a gigantic puzzle 了解这些巨大难题的片段
fit together and work as an ecosystem. 相互配合并作为生态系统工作。
Yes, we're just getting started. 是的，我们才刚刚开始。
(cheerful music) （欢快的音乐）
The deep oceans and their mysterious 深海及其神秘
light producing creatures have long been out of our reach. 长期以来，发光生物一直遥不可及。
Now, with the help of new technology 现在，借助新技术
and the latest research, we're beginning 和最新的研究，我们开始
to unravel some of their secrets. 揭露他们的一些秘密。
But many mysteries remain, and we're still 但是，许多谜团仍然存在，我们仍然
a long way off from understanding just what makes these 要了解这些因素是什么，还有很长的路要走
marvelous living lights glow in the abyss. 奇妙的生活灯在深渊中发光。
(cheerful busy music) （快乐忙碌的音乐）