1, pond crab is a kind of fish, edible, and pond lice is catfish. The scientific name of the Egyptian pond louse, Silurus aegypti, also known as Silurus Gezi, is a freshwater catfish native to the Nile valley in Africa. In recent years, the culture of Egyptian pond horn fish has become popular and achieved considerable economic benefits. After 198 1 was introduced into China, it has been popularized in southern provinces for several years, which proves that this fish really has excellent economic characteristics of fast growth and large size. Egyptian pond fish belong to Silurus, Silurus and Silurus, and belong to the same species as local Silurus, Thai Silurus and Thai Silurus.

2. The pond fish has a long body, a flat head, a smooth and scaleless surface and lateral lines. The body color is generally grayish brown, with many grayish white striped patches and black spots on the face, and the abdomen is white, and the dorsal fin and anal fin extend to the base of the caudal fin. The caudal fin is fan-shaped, the pectoral fin is short and round, and the spine is hard, so it can crawl on land.

3. The mouth of pond fish is wide, transverse, with sharp teeth and slightly lower mouth, with 4 pairs of tentacles and 2 pairs of upper and lower jaws. There are dense villous fine teeth on the upper and lower prizes and plough bones.