肉眼检查,主要是检查能用肉眼识别的症状和病原体。现在简单介绍一些常见鱼虾蟹病的肉眼诊断方法。注意检查时要选取新发病的和刚死不久的进行检查。1鱼病的诊断 肉眼诊断鱼病,主要检查体表、鳃和内脏。1.1体表 将病鱼置于白搪瓷盘中,按顺序从头部、嘴、眼、鳃盖、鳞片和鳍条等处仔细观察,在体表可以看到各种鱼 Eye examination, mainly to check the symptoms and pathogens can be identified with the naked eye. Now a brief description of some common methods of visual diagnosis of fish and crabs. Attention to check the time to select the newly diagnosed and just died shortly before the inspection. Diagnosis of a fish disease Fish eye disease diagnosis, the main check body surface, gills and internal organs. 1.1 body surface Disease fish will be placed in white enamel dish, in order from the head, mouth, eyes, gill cover, scales and fins and other places carefully observed in the body surface can see a variety of fish