copepods

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

水昆虫而桡脚的动物，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、温度和捕食压直接影响风险收益值的大小，影响桡足垂直迁移的主要环境因子。