我国养鱼面积每年递增,全国各地每年都新开鱼池。在一些地方的新开鱼池中,鱼类常患一些少见的疾病,如有的鱼体尾部萎缩弯曲或身体其它部位畸形;有的鱼体鳃部红肿,粘液增多而浓稠,通过镜检又没有发现致病菌等等,曾有不少渔农就此向我们求教。笔者认为此种情况除一部分是营养因素、致病菌引起的,大部分则是由于新开鱼池中,各种重金属离子含量过高,毒害鱼类引起的。在一些地方的土壤中,含有较多的汞、铅、铜、锑等重金属盐 The area of ​​fish farming in our country is increasing every year. New fish ponds are opened every year in all parts of the country. In some newly opened fish ponds, the fish often suffer from some rare diseases, such as the shrinkage of the tail of the fish or other parts of the body deformity; some fish gills swelling, mucus increased and thick, through the microscope Did not find pathogens, etc., there have been many fisheries to this neighborhood. I believe that in addition to this situation is part of the nutritional factors, caused by pathogens, most are due to the new open fish ponds, a variety of heavy metal ion content is too high, poisoning caused by fish. In some places the soil contains more heavy metals such as mercury, lead, copper and antimony