目前经销的南方大口鲶苗主要有三种，一种是纯正大口鲶苗，其亲本个体重10公斤以上，人工繁殖后代仅养殖120天尾重即达3公斤，最大的达6公斤；另一种是杂交型大口鲶苗，其母本体重只有3公斤（属近亲繁殖后代），父本为纯土鲶（本地鲶），体重500克，繁殖后代尾重1公斤；还有一 At present, there are mainly three kinds of largemouth catfish distributed in the world, one is a pure largemouth catfish, and its parents weigh more than 10kg. Artificial breeding offspring only breeds 120 days of tail weighing up to 3kg and the largest reaches 6kg; Is a hybrid largemouth catfish, the mother of the body weight of only 3 kilograms (offspring of inbreeding), the father of pure catfish (native catfish), weighing 500 grams, breeding tail weight 1 kg; there is a