a large fish that has sharp teeth and a pointed fin on its back

a great white shark 大白鲨

a basking shark 姥鲨;象鲛

The movie "Jaws" is about a man-eating shark. 电影《大白鲨》讲的是一条食人鲨。

a dishonest person, especially one who persuades other people to pay too much money for something

People who need a place to live can often find themselves at the mercy of local property sharks. 需要住房的人常常会发现自己被当地那些奸诈的房地产商人所摆布。