Dolphins work together to catch prey. Dolphin pods will swim circles around a school of fish until the fish are tightly packed together.

海豚协同合作捕捉猎物。海豚小绕着一群鱼游圈，直到鱼群被紧紧包在一起。

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。

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，鱼群逃走，礁石也遭受破坏。

Scientists can't say for sure if the fish that the noises attracted actually stuck around.

家无法确定噪音所吸引的鱼群是否逗留。

There might be a big one around that school, he thought.

那个鱼群周很可能有一条大的，他想。

At such a low temperature, fish keep still.

这样的低温中，鱼群聚集不动。

With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

根据经验和改进了的仪器，不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。

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。

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。

A shoal of fish will do this.

鱼群也反射声音。

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

最近，他建立了鱼群行为模型。

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

未来鱼群数量将降至危险水平。

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

自 1970 年以来，海里的鱼群的数量已经下降了 50%。

Fredric Manach said this method uses two-kilometer-long nets that surround whole schools of fish.

弗雷德里克·马纳赫说，这种方法使用两公里长的网来包整个鱼群。

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。

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。

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厅的楼梯。

Physics professor Matthew Turner said what works in the air could work in the water.

物理家教授马修·特纳称鸟类的这种特性在海中的鱼群也同样拥有。

Once the catch is concentrated, the net is released from its anchor points.

一旦集中了鱼群，他们就将网从固定点松开。