罗非鱼由于其肉质鲜美,营养丰富,口感好,深受国内外消费者欢迎。同时,罗非鱼又具有生长快、杂食、病害少等优点,从而受到广大养殖户的青睐,这也是罗非鱼养殖得到迅速发展的重要原因。但近几年来,随着罗非鱼养殖规模不断扩大,养殖密度的不断提高,水体环境的恶化,导致罗非鱼病害? Tilapia because of its delicious meat, nutritious, good taste, welcomed by consumers at home and abroad. At the same time, tilapia also has the advantages of fast growth, omnivorous, less disease, which is favored by the majority of farmers, which is also an important reason for the rapid development of tilapia farming. However, in recent years, with the increasing scale of tilapia farming, breeding density continues to increase, the deterioration of water environment, leading to tilapia disease?