Nets or hooks often trap many more kinds of animals than intended, such as sharks, dolphins, or turtles.

渔网和鱼钩经常会捕到目标鱼类外的很多其他动物，如鲨鱼，海豚或者海龟。

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In some countries, people eat all kinds of animals such as sharks, dolphins etc. How do you look at this?

在一些国家，人们食用各种动物，包括鲨鱼、海豚等，你如何看待这个问题？

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Barracuda (Sphyraena sp.) feed on small fish and may protect themselves against larger predators, such as sharks, by aggregating in schools.

梭鱼饲料是小鱼，并可能保护自己免受更大的掠食者，如鲨鱼，由聚集在学校。

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Other species such as blacktip reef sharks did not show this behaviour.

BBC: Sharks navigate using 'mental maps'

They also provide a habitat for fish and other species of ecological and commercial interest, such as orange roughy, swordfish, tuna, sharks, turtles and whales.

UNESCO: MEDIA SERVICES

In sharks with a usual head, such as the lemon shark (Negaprion brevirostris), the field of vision of each eye overlaps by just 10 degrees.

BBC: Earth News - Hammerhead shark mystery solved