This is a large-scale squid, belonging to CYPRINIDAE, Siluridae and Siluridae. After entering China, people also call it freshwater cod, freshwater cod (and seawater cod). It is a wide-temperature fish with delicious meat, fast growth, strong stress resistance, salt and alkali tolerance and other excellent characteristics. Amu Darya River, native to Uzbekistan, is a precious large-scale economic fish in the country and has been listed as a rare and endangered fish in Uzbekistan. Megalobrama amblycephala belongs to CYPRINIDAE, Megalobrama subfamily and Megalobrama. This kind of fish is spindle-shaped, with a small head, a slender body, a close mouth and a pair of kisses and jaws. A pair of pectoral fins, a pair of ventral fins, a row of dorsal fins and a row of gluteal fins. The starting point of dorsal fin is located at the front end of the starting point of ventral fin, and the caudal fin is bifurcated. The body is covered with strange luminous scales, and the lateral line is clear and straight. The back of the body is silver gray and the abdomen is white.