Silurus is a kind of fish of Silurus in Silurus family. The front of the body is thick and round, the tail is flat and the head is wide and flat. This kiss is short, wide and round. Two pairs of nostrils, the front nostril has a short tube near the snout. The mouth fissure is large, and the upper and lower jaws are slightly prominent. There are a row of furry teeth on both jaws. Young fish have three pairs of whiskers, and adult fish only have 1 pair of mandibular whiskers degenerated. The maxillary beard is slightly longer than the head, and the mandibular beard is 1/3 ~ 1/5 of the maxillary beard.

The general term for catfish. The head is big and flat, the mouth is wide, and there are four long whiskers on the upper and lower jaws, without scales and sticky skin. The back is gray-black, the abdomen is white, and the thorns on the dorsal fin and pectoral fin are poisonous. There are about 2500 species, distributed all over the world. It grows in rivers, lakes and ponds, inhabits underwater mud during the day and comes out at night, feeding on small fish, shellfish and frogs.