鱼类疾病多为病原微生物造成，但因多数养鱼户缺乏必要的显微镜设备及相关的专业知识，判断病原微生物力不从心。因此，养鱼生产中，应从多种因素去判别诊断鱼是否生病。现介绍几种常用方法：一、鱼的活动情况健壮的鱼一般是成群集游，行动灵活，反应敏捷，受惊即潜。病鱼则通 Most fish diseases are caused by pathogenic microorganisms, but most fish farmers lack the necessary microscope equipment and related professional knowledge to judge the pathogenic microorganisms. Therefore, fish production, there are many factors that should be judged whether the diagnosis of fish sick. Now introduce several commonly used methods: First, the fish activity Sturdy fish is generally a cluster tour, flexible action, quick response, frightened that is submerged. Fish disease is open