" 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动物，像龙或螃蟹那样有甲壳的，但是非常小的。

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、温食压力直接影响风险收益值的大小，是影响桡足类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类无节幼体、桡足幼体多毛类担轮幼体,但还摄食少量的颗粒有机碎屑。