crustacean GRE

1.These crustaceans provide a valuable food source for some fish.

壳纲物是类重要的食物来源。

2." 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物，像龙虾或螃蟹那样有壳的，但是非常小的。

3.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，硬鳞殴打海水来自嘴里去揭露猎物，如软体物，壳类，蠕虫和海绵物。