1, nutritional value. Catfish is a kind of fish in the genus Luko Shad, also known as long-nosed shad and so on. It and the swordfish, anchovies and known as the Yangtze River three fresh, its high protein, low fat, rich in a variety of vitamins and trace elements, is a good nutritional tonic. Catfish only has more protein and fat, nutritional value slightly inferior to catfish.

2, the number. Catfish are widely distributed in all parts of the sea, very easy to raise, and catfish growth environment requires high, and thus their numbers are small, artificial breeding success rate is low, things are rare, and thus catfish prices are more expensive.