随着养殖规模的扩大及养殖密度的大幅度提高,常常会引发鱼病,同时因地区间的苗种、亲鱼流动的频繁,也相应扩大了鱼病的传播和流行的可能性。一旦发生鱼病,不权影响生长而且成活率也会下降,严重时大批死鱼,造成重大经济损失。而且鱼类栖息水中,这给鱼病的诊断治疗带来诸多不便, With the enlargement of breeding scale and the drastic increase of breeding density, fish diseases are often caused. At the same time, due to the frequent flow of seedlings and broodstock between regions, the spread and prevalence of fish diseases are correspondingly expanded. Once a fish disease occurs, it is not entitled to affect the growth and the survival rate will drop. In severe cases, a large number of dead fish will result in significant economic losses. And fish habitat in the water, which gives the diagnosis and treatment of fish diseases caused a lot of inconvenience,