近年天津市观赏鱼养殖品种呈现多样化发展,新的观赏鱼品种淡水蓝鲨落户津城,津郊养殖、暂养该品种的养殖户渐多,经济效益可观。淡水鲨鱼为热带性鱼类,色彩鲜艳,也可作观赏鱼养殖。目前由于养殖密度高、管理不善、防病治病措施不力等原因,养殖期间病害易暴发流行,给养殖户造成较 In recent years, the ornamental fish breeding varieties in Tianjin showed diversified development. The new ornamental fish species, freshwater blue sharks, settled in Jincheng and Jinjiao. There are more farmers who hold this variety and the economic benefits are considerable. Freshwater sharks are tropical fish that are colorful and can also be used for ornamental fish farming. Currently due to high density farming, poor management, disease prevention and treatment of ineffective and other reasons, the disease prone to outbreaks during the epidemic, to farmers caused more