Wu fish, also known as blackfish, raw fish, channa fish, talent fish, etc., belongs to the perch-shaped order, channa family. In China, there are two genera of fish in the family Channaidae: Channa and snakehead. Within the genus Channa, there are seven species of snakeheads (and Heilongjiang subspecies), snakeheads, snakeheads, snakeheads, snakeheads, snakeheads, snakeheads, snakeheads, etc., as well as a white one; the genus Channa has only one species of snakeheads. Currently as the object of culture is snakehead and spotted snakehead.