A shoal of fish will do this.

鱼群也反射声音。

This one named Wellington made a beeline to the fish.

这只叫惠灵顿的企鹅径直走向了鱼群。

Future numbers of the fish will drop to dangerously low levels.

未来鱼群数量将降至危险水平。

At such a low temperature, fish keep still.

这样的低温中，鱼群会聚集不动。

Many fish that depend on phytoplankton swam away from the area.

以浮游生物为食的大量鱼群离开海域。

That way, the fish do not travel through unhealthy waterways.

这样，鱼群就不必通过不友好的水路。

Fish usually swarm in the morning and evening when the southwest monsoon dominates.

鱼群通常在西南季风来临的清晨和傍晚活动。

They followed the fish up a staircase, which opened into a grand ballroom.

他们跟着鱼群游向通往大宴会厅的楼梯。

At the first sign of trouble, schooling fish swim as close together as they can get.

一旦发现危险，鱼群尽可能的游得紧紧地。

As a result, sea birds and sea lions that eat those fish starved.

最终导致以鱼群为生的海鸟和海狮失去食物来源。

Although these populations might be able to adapt by shifting their spawning grounds northward.

尽管这些鱼群可以通过将产卵地向北迁移来适应这一变化。

It's these shoals that support most of the world's sea mammals.

鱼群也养育了世界上大多数海洋哺乳动物。

Oil-rig reefs may shelter and feed up to eight tonnes of fish.

石油钻塔珊瑚礁可以给高达8吨的鱼群提供庇护以及食物。

But when reefs are bleached or damaged, the fish flee, and the reef suffers.

但当珊瑚礁白化或受损后，鱼群会逃走，礁石也会遭受破坏。

So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.

从测定海深到测定鱼群，这一进展比较容易。

He swam above the fish shoal, and then...he slapped the water, killing or stunning the fish.

鲸鱼游到鱼群上方，然后拍打水流将鱼杀死或击昏。

Most recently, he has modelled the behaviour of shoals of fish.

最近，他建立了鱼群行为模型。

The number of fish in the sea has dropped by 50% since 1970s.

自 1970 以来，海里的鱼群的数量已经下降了 50%。

There are fish-operated grooming stations under the sea with patient customers and busy cleaners.

在海底有鱼群经营的美容院，那里有耐心的顾客和忙碌的清洁工。

In the Philippines, we filmed fishermen herding all the fish on a reef into a huge net.

在菲律宾，我们拍摄渔民们用一张大网捕捉暗礁里的鱼群。