Shoaling and schooling

Underwater video loop of a school of herrings migrating at high speed to their spawning grounds in the Baltic Sea

Schools of forage fish often accompany large predator fish. Here a school of jacks accompany a great barracuda.

In biology, any group of fish that stay together for social reasons are shoaling (pronounced /ˈʃoʊlɪŋ/), and if the group is swimming in the same direction in a coordinated manner, they are schooling (pronounced /ˈskuːlɪŋ/). In common usage, the terms are sometimes used rather loosely. About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives.

单词	Fish shoal
释义	Fish shoal 原声例句鲸奇之旅 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。英语百科 Shoaling and schooling In biology, any group of fish that stay together for social reasons are shoaling (pronounced /ˈʃoʊlɪŋ/), and if the group is swimming in the same direction in a coordinated manner, they are schooling (pronounced /ˈskuːlɪŋ/). In common usage, the terms are sometimes used rather loosely. About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives.
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Fish shoal

Shoaling and schooling