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水螅对金鱼有什么危害
更新时间: 2019-01-11 00:00:00  

水螅是一种腔肠动物,体长近0.5cm。肉眼可见,由于体 小,只能捕食鱼卵和刚刚孵出的小鱼苗。但有时池中水螅很多, 所以危害也不小。水螅根治困难。发现后只能设法将鱼苗或鱼 卵移走。

关键词: 水螅 金鱼 什么 危害

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