BBC | 《南太平洋》-无尽汪洋 06
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Unlike the open ocean,
和开阔的海洋不一样，
the water here is rich in plankton,
这里的水富有浮游生物，
feeding huge shoals of fish and even giant manta rays.
生长着大群的鱼和巨蝠鲼。
Each sea lion needs over six kilograms of fish a day.
每只海狮每天吃6kg以上的鱼。
With shoals this size, it shouldn't be too difficult.
有了这些鱼群，这不成问题。
But it's not easy picking one fish out of the crowd.
但是，从鱼群中吃掉一只确非易事。
The fish know there's safety in numbers,
鱼知道成群是安全的，
so for the sea lions the trick is
因此海狮的对策是
to snip the shoal into smaller and smaller balls.
将鱼群变成越来越小的球。
Finally, a fish breaks for cover.
最终，一只鱼脱离鱼群。
It's what the sea lions have been waiting for.
这正是海狮所期待的。
Crevices in the reef might seem to offer shelter.
礁石的裂缝似乎能提供庇护。
But that's no problem for the sea lions,
但，对海狮来说不是问题，
who simply scare them out with bubbles.
用气泡轻松把鱼赶出来。
With the sea lions distracted,
在海狮的追扰下，
the fish regroup and the chase starts all over again.
鱼再次结群，追猎再次开始。
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