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

水蚤不昆虫桡脚的动物，像龙虾或螃蟹那样有甲壳的，但非常小的。

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风险收益值的大小，影桡足垂直迁移的主要环境因子。

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食土池水体中的桡足无节幼体、桡足幼体和多轮幼体,但还摄食少量的颗粒有机碎屑。