人体患病可采用问、闻、望、切或仪器诊断,鱼类得病又怎样诊断呢? 目前一般采用肉眼诊断和显微诊断两种方法。所谓“肉眼观察”就是用眼睛直接观察鱼类活动、体色和摄食状况。健康的鱼体色鲜艳,食欲旺盛,投喂食料后鱼很快游往食场吃食;有病的鱼则食欲减退或停止吃食,离群游动,体色暗淡或发黑。从鱼池捞出病鱼或刚死去的鱼,对其嘴、眼、鳞片、鳍条等部位进行检查,肉眼可发现有水霉、线虫、锚 Human illness can be used to ask, smell, hope, cut or instrument diagnosis, fish disease and how to diagnose it? The general use of the naked eye diagnosis and microscopic diagnosis of two methods. The so-called “naked eye observation” is the direct observation of fish eyes, body color and feeding status. Healthy fish body color bright, appetite, after feeding the fish quickly swim to the food court; sick fish, loss of appetite or stop eating, outing swimming, body color dim or black. Fish out from the fish pond or fish just died, its mouth, eyes, scales, rays and other parts of the check, the naked eye can be found in water mold, nematodes, anchors