The water quality of wild catfish is different from that of raised catfish. The environment in which wild catfish lives is less polluted, but rich in various organic matters and trace elements. However, the water quality in artificial conditions is treated, so both trace elements and organic matters have changed. The food is different. Catfish in wild environment have to prey on their own, and the food is all natural, which is different from that in artificial breeding. In order to improve the breeding speed, a lot of compound feed is usually added, and many other elements are also added in the feed.