Yellow crucian carp, yellow crucian carp (Valenciennes, 1848), with common names of Carassius auratus, Makouqian, Mao Kou, yellow _, feather catfish, yellowbird, red nose, yellow tip, white red, awn mouth, thin mouth and oil buckle, belong to the genus Carassius. Distributed in Indian Ocean and western Pacific Ocean. It is produced in South China Sea, East China Sea, Yellow Sea and Bohai Sea. It can be captured all year round, with spring and autumn as the peak season and concentrated output. The spawning period in the South China Sea is from February to April, and in the northern part of the East China Sea is from May to June. Eggs float and are spherical. Have the characteristics of migration.