crustacean GRE

These crustaceans provide a valuable food source for some fish.

这些甲壳纲是某些类重要的食。

" Water flees fleas" are not insects but copepods, a crustation crustacean like lubster lobsters and crubs crabs but extremely small.

水蚤不是昆虫类而是桡脚类的，像龙虾或螃蟹那样有甲壳的，但是非常小的。

Solitary in nature, the trunkfish blows water out of its mouth to expose prey such as mollusks, crustaceans, worms, and sponges.

孤立的性质，硬鳞殴打海水自嘴里去揭露猎，如软体，甲壳类，蠕虫和海绵。