Breeding technology and the quality of released seedlings. Tangjiao fish, whose scientific name is Silurus beardus, is a common freshwater wild fish in southern China. How many hundred thousand pond horn fish will be left after half a year depends on the culture technology and the quality of the fry. For pond horn fish with sufficient feed and good water quality, it is appropriate to put fry 10000 per mu. After each fish is cultivated, the target yield per mu is 20,000 kg. The current wholesale price is about 1 kg in 4 yuan, and the total income per mu is about 80,000 yuan, excluding the cost of artificial feed, etc. With high economic value, it is a nourishing food deeply loved by people.