生命（2009）

地球确实是个蓝色的星球
Ours is truly a blue planet.
地表大部分被水覆盖
Water covers most of the world's surface.
这里不是我们的地方
Here we are the outsiders.
但有一群生物 在海浪下蓬勃发展
But under the waves one group thrives.
鱼类
鱼类是水中之王
Fish are masters of the waters.
其中以旗鱼的速度最快
And sailfish are the fastest of them all.
它们靠速度成为 海洋最恐怖的掠食动物
Their speed makes them one of the ocean's most fearsome predators.
在墨西哥外海
Off the coast of Mexico,
三十条旗鱼包围了一群沙丁鱼
30 sailfish have surrounded a ball of sardines.
要捕捉猎物不光要速度快而已
To catch their prey requires more than speed alone.
即使最迫切的急转弯 鱼鳍依然稳如泰山
In the tightest turns, fins maintain stability.
它们靠镰刀状的尾巴向前推进
Their sickle-shaped tail powers them forwards
独树一格的背鳍 帮它们恫吓猎物
and that extraordinary dorsal fin helps intimidate their prey.
动作太快 肉眼看不见
To the naked eye, the action is too fast,
变成慢动作 就明白它们面对了什么挑战
slowed, their challenge becomes clear.
光是挑选目标就够棘手了
Just picking a target is hard enough.
让猎物失去平衡和鱼群分开
Knocking it off balance, separates it from the shoal.
可需要不同凡响的技巧
This requires extraordinary skill.
并非每次出手都有斩获
Not every attempt is successful.
但有更多旗鱼加入
But as more sailfish join in,
一条鱼失败了 另一条就补上一记
when one misses another takes its place.
它们按部就班地 把这群沙丁鱼歼灭
The shoal of sardines is methodically wiped out.
旗鱼是头号♥掠食动物 几乎所向无敌
Sailfish are top predators, very little threatens them.
但大多数的鱼类 可没有这种优势
But for the majority of fish this is not the case.
对大多鱼类而言 海洋危机四伏
For most fish the open ocean is extremely dangerous.
有些鱼类使出非常手段 只为求生存
And some go to extraordinary lengths just to survive.
飞鱼
Flying fish.
它们跃出水面 靠加长的鱼鳍翱翔
Free of the water they soar on elongated fins,
把它们的掠食动物抛得远远的
leaving their predators far behind.
鱼儿凌空飞翔
A flight of fish.
逃离掠食动物 并非飞鱼面对的唯一挑战
Escaping predators is not the only test facing the flying fish.
它们还得保护发育中的幼鱼
They must also protect their developing young.
这些飞鱼正在寻找一样东西
These flying fish are searching for the one thing
好让幼鱼得到保护
that will make this possible.
在这片汪♥洋♥大海这差事可不简单
In such a vast ocean it's not easy.
它们走运了
They're in luck.
一片棕榈叶
A palm frond.
这是漂浮在 浩瀚汪♥洋♥中的一座小岛
It's a tiny island adrift in a huge ocean.
如小岛一般提供栖身之所
And like an island it offers shelter,
收容的不是飞鱼 而是飞鱼卵
not for the flying fish, but for their eggs.
母鱼在叶子上产卵 由公鱼让卵子受精
The females lay eggs on the raft, where the males fertilise them.
第一条鱼产卵 触发其他飞鱼跟进
The first fish spawn and this triggers the others to start.
随即有数千条鱼加入这场乱局
Soon thousands join the melee.
产下数之不尽的一串串鱼卵
Innumerable strands of eggs are laid.
压得叶子开始倾斜
The raft starts to tilt under their weight.
最佳产卵地点是棕榈叶内侧
The best place to lay eggs is right inside the frond.
有些飞鱼赔上一条命
For some the attempt proves fatal
活生生的鱼儿就葬身此处
and living fish become entombed.
大量鱼卵压得叶子直往下沉
The raft starts to sink under the weight of so many eggs.
但这并不是什么灾难
But this is far from a disaster.
远离水面下沉
Sinking away from the surface
其实增加了鱼卵生存的机会
actually improves the eggs' chances of survival.
安全地躲在海底深处
In just a few days, having been safely hidden in the depths,
短短几天后即可孵化
they'll hatch out.
其他鱼类以不同的方式保护子女
Other fish protect their offspring in different ways.
有些为了照顾儿女 花费的心力更是大得多
Some go to far greater lengths to care for them.
澳洲南部的浅海 孕育了许多古怪生物
The shallow waters of southern Australia are home to many strange creatures.
这个童话世界里有海马
It's a fairytale world of sea horses...
瞻星鱼
..stargazers...
和刺魟
..and stingrays.
但草海龙的美是无与伦比的
But none compare with the beauty of the weedy sea dragon.
草海龙的小鳍拼命拍击
The dragon's tiny fins beat frantically
以免被水流冲走
to prevent the current from sweeping it away.
现在是初春时分
It's the beginning of spring,
草海龙开始求偶的时节
the season when sea dragons begin their courtship.
在昏暗的暮光中它们开始跳舞
And in the evening light, they start to dance.
这一曲优雅的双人舞 两个舞伴的动作一模一样
In a graceful duet, each partner mirrors the actions of the other.
夜幕即将降临
Darkness will soon draw a veil over the pair
但这一对会一直跳到深夜时分
but they will dance on, into the night.
两个月后，它们求偶的结果揭晓
Two months later, and the result of their courtship is revealed.
这是公海龙
It's the male
卵由它携带
and he's the one that's carrying the eggs,
一排又一排的卵嵌在它的尾巴上
with rows and rows of them embedded in his tail.
母海龙当晚把卵转移给它
That night the female transferred her eggs to him.
从此公海龙一肩扛起照顾之责
Since then, the male alone has cared for them.
把卵带在身上，确保它们的安全
By carrying them with him he's kept them safe.
现在它的努力即将得到回报
And now it's time for his efforts to be rewarded.
卵要孵化了
The eggs are ready to hatch.
在一个宁静的夏日清晨
In the calm of a summer morning
黏着卵黄囊的海龙宝宝出生了
a baby sea dragon, with yolk sac still attached, is born.
已能自行觅食的较大海龙
The weed bed shelters older dragons
栖息在海藻之间
that are already able to feed themselves.
尽管父亲把这些海龙照顾得很好
Although these dragons were well cared for by their father,
但它们到世上闯荡的时候到了
now they must find their own way in the world.
但有些鱼类 为幼鱼提供的安全庇护
There are fish, however,
要长久得多
which provide their young with a safe refuge for far longer.
西南太平洋
The south western Pacific.
这是一条白条锦鳗鳚 算是一种海洋建筑师
A convict fish and it's something of a marine architect.
它在地底打造出一座地道迷宫
Underground it has created a labyrinth of tunnels.
这条成鱼从未离开洞穴
This adult never ventures out of its burrow,
它到底吃什么，令人费解
what it eats is a mystery.
但穴居在这里的不只它一个
But it doesn't live here alone.
在另一个入口 好几张脸向外凝望
At another entrance faces peer out.
幼年的白条锦鳗鳚
Juvenile convict fish.
和父母不同的是 幼鱼不会整天躲在洞里
Unlike their parent, the youngsters are not tied to the burrow.
从洞穴冒出来 稀稀落落几条鱼变成一大群
And as they start to emerge, a trickle becomes a flood of fish.
总共有好几千条
There are thousands of them.
它们个个都会帮忙做家事
And they all help with the chores.
正所谓鱼多好办事
Many hands make light work.
幼鱼成群结队 几千张嘴大啖浮游生物
The young fish swarm together. Thousands of mouths gulping plankton.
成鱼的食物 想必和这些幼鱼脱不了关系
What the adults eat must somehow involve these youngsters.
幼鱼到底是把食物吐出喂给父母
Whether the young feed their parents by regurgitating food
还是透过其他某种机制 我们不得而知
or through some other mechanism, we just don't know.
不管是怎么回事 幼鱼为父母提供食物
Whatever the answer, the youngsters provide
换取一个容身之所
their parents with a meal and in return get a roof over their heads.
生儿育女只是其中一项挑战
Producing young is just one challenge.
寻觅食物和栖身之所 是鱼儿必须面临的进一步考验
Finding food and somewhere to live are further trials fish must face.
加州海岸 各式各样的物种栖息在这儿
The Californian coast, a wide range of species live here.
但这林林总总的生物 代表生活空间的竞争激烈
But all this life means competition for living space is intense.
老旧贝壳非常宝贵
Old shells are highly prized.
占据这个贝壳的 是一条勃氏新热鳚
And this one is occupied by a sarcastic fringehead.
这种鱼类特别爱吵架
These fish are exceptionally quarrelsome,
为了扞卫它们的生活空间 非如此不可
they have to be, to defend their living space.
一只章鱼
An octopus.
一个不小心晃悠到了 勃氏新热鳚的地盘
Inadvertently it's wandered into the fringehead's territory
是可忍♥，孰不可忍♥
and that can't be tolerated.
章鱼张牙舞爪地 让勃氏新热鳚无法越雷池一步
The octopus's impressive jab holds the fringehead at bay.
发生这种行为不只是脾气不好
There is more to this behaviour than being bad-tempered.
勃氏新热鳚必须扞卫自己的地盘 才能觅得足够食物
The fringehead needs to defend its patch if it is to get enough to eat
章鱼是来抢饭碗的
and the octopus was competition.
螃蟹可不是随抓随有的食物
Crabs are not the easiest of mouthfuls.
由于生活空间不足 经常发生边界纷争
Because of the shortage of living space there are constant boundary disputes,
特别是和其他勃氏新热鳚的纷争
especially with other fringeheads
这家伙踩到红线了
and this one has got too close.
尽管遇上声势最大的威胁
Despite the most extravagant threats...
两边谁也不打算让步
..neither is prepared to back down.
成功 它迅速钻回它的贝壳里
Success, and it's quick to get back to its shell.
勃氏新热鳚必须时时提高警觉 四周的竞争太多
A fringehead can never drop its guard, there's too much competition.
有些鱼类迁移到对手较少的地方
Some fish have moved to places where they have fewer rivals.
一条弹涂鱼 这种鱼大多不在海里生活