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

水昆虫类而桡脚类动物，像龙或螃蟹那样有甲壳，但非常。

3.Food, temperature and predation pressure directly act on the value of venturous revenue and are major environmental factors affecting DVM of the copepod.

3．物、温度和捕压力直接影响风险收益值大，影响桡足类垂直迁移主要环境因子。

5 to 7 days' larve after hatching larvae mostly lived on copepod nauplii, copepodites and trochophore of Polychaeta in water of the earthen ponds, apart from feeding on particulate organic detritus.

孵化后5～7日龄仔鱼基本上依靠摄土池水体中桡足类无节幼体、桡足幼体和多毛类担轮幼体,但还摄少量颗粒有机碎屑。