Catfish is a carnivorous fish, predatory objects are mostly small fish, such as meal strips, crucian carp, goby, whelk, carp, loach, etc., but also ate shrimp and aquatic insects, mainly swallowing, the role of the teeth is mainly to prevent the escape of food. Catfish is very voracious, about 500 grams of young fish will be swallowed in large quantities of crucian carp, carp, etc., suitable for living in the water temperature of 20 to 25 ℃ waters