This group is led by Mr Zhang, an expert in tracking down shoals of bighead carp.

这一队的队长是张先生，他可是追踪胖头鱼群的行家里手。

Thirty miles away, shoals of squid are jetting upwards towards the surface.

30英里外的海上，大量的鱿鱼游到海面上。

With countless shoals and reefs to negotiate, accidents may happen any time.

还有盗匪 ——实在是最可怜的同胞，他们种地没得吃，有力气没处出卖，当了兵经常饿肚皮，无奈何只好出此下策 。——假如遇见了，把铺盖或者身上衣服带下去，也是异常难处的事儿 。

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。

A shoal of fish will do this.

鱼群也反射声音。

Wherever they went, sailors kept scrupulous logs, detailing narrows and shoals for future adventurers.

无论走到哪里，水手们都会一丝不苟地记录下日志，为未来的冒险者详细描述狭窄的水域和浅滩。

This will give some idea of the havoc it makes among shoals of fish.

由这可想而知，它是如何肆意蹂躏浅滩上的鱼类的。

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

最近，他建立了鱼群行为模型。

Alas, merely observing a shoal does not make it clear which individuals lead and which follow.

然而，仅仅只观察一个鱼群并不能清楚地区分哪个是领导，哪个是随从。

Squid, which can be found mainly in estuarine, deep-sea, and open-water habitats, often swim together in shoals.

乌贼，主要分布在河口，深海和开阔水域的栖息地，经常在浅滩游泳。