2, Grass carp (scientific name: Ctenopharyngodon idella) is a fish of the carp family, genus Grass carp. Common names of grass carp are: grass carp, oil grass carp, grass carp, grass carp, white grass carp, grass roots (Northeast) and so on. The body length is 3.4 to 4.0 times the body height, 3.6 to 4.3 times the head length, 7.3 to 9.5 times the caudal peduncle length, and 6.8 to 8.8 times the caudal peduncle height. Body elongate, snout slightly blunt, hypopharyngeal teeth in 2 rows, comb-shaped.

3. The dorsal fin has no hard spines, and the outer edge is flat and straight, located above the ventral fin, and the distance from the starting point to the base of the caudal fin is closer than to the end of the muzzle. Gill rakers are short and few in number. The body is tea-yellow, the abdomen gray-white, the edge of the lateral scales gray-black, pectoral fins, ventral fins gray-yellow, other fins light-colored.