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

水蚤不是昆虫而是桡脚动物，像龙或螃蟹那样有甲壳，但是非常。

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．食物、温度和捕食压力直接影响风险收益值，是影响桡足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日龄仔基本上依靠摄食土池水体中桡足无节幼体、桡足幼体和多毛担轮幼体,但还摄食少量颗粒有机碎屑。