蚂蟥是环节动物门蛭纲的一些种类的俗称,也叫水蛭。许多地方在黄鳝养殖中出现大量蚂蟥寄生黄鳝体表引起黄鳝逐步死亡的现象,特别是在稻田等浅水中养黄鳝时更为严重。一般养殖密度越大,传染速度越快,死亡量也从少到多最 Leech is a common name for some species of the genus Leptograph, also known as leeches. Many places appear in the eel farming a large number of leech parasitic surface eel body surface caused by the gradual death of the eel phenomenon, especially in rice and other shallow water when feeding eel even more serious. General breeding density, the greater the speed of infection, the amount of deaths from less to most