copepods

" 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脚类动物，像龙虾或螃蟹那样有甲，是非常小。

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、温度和捕食压直接风险收益值大小，是足类垂直迁移主要环境因子。