鱼类、蟹类、章鱼都是自游动物的组成部分。

Fishes, crabs, octopus, are part of nekton.

youdao

根据1990年春季至1991年冬季采自南日岛海域浮游动物样本，初步鉴定出98种浮游动物和12类浮游幼虫。

The samples, which were collected in Nanri Islands sea area from spring, 1990 to winter, 1991, were studied. 98 species of zooplankton and 12 groups of planktonic larvae were identified.

youdao