在养鱼生产中,做到有效地防治鱼病,首先要能正确地诊断鱼病。下面介绍一种简单实用的肉眼诊断鱼病方法,肉眼诊断法是捞取3～5尾病鱼或因病刚死还未腐烂的鱼,仔细观察鱼的体表,鳃和肠道,作分析诊断。一、观察鱼体表:病鱼身体两侧肌肉、鳍基部,特别是臀鳍基部都充血,有时眼睛也充血;剥开皮肤时,病情轻的,肌肉呈不同程度的点状充血,病情严重的,全身肌肉呈深红色,这是出血病,病鱼体表局部发炎、充血、鳞片脱落、鳍条末端腐烂、鳍条裂开,则为赤度病;肛门红 In fish production, effective prevention and control of fish diseases, we must first be able to correctly diagnose fish diseases. Here is a simple and practical method of visual diagnosis of fish diseases, the naked eye diagnosis is to fish 3 to 5 fish or died of illness has not yet decayed fish, carefully observe the surface of the fish, gills and intestines for analysis and diagnosis . First, observe the surface of the fish: sick fish on both sides of the body muscles, the base of the fin, especially anal fin base are congestion, and sometimes the eyes are also hyperemic; peel the skin, the condition of light, muscle showed varying degrees of congestion, severe , The body muscles were dark red, which is bleeding, sick fish body surface inflammation, congestion, scaling off, the ends of the decayed fin, the rays split, then the disease; anal red