Also known as snakehead, snakehead, commonly known as snakehead, flower fish, snakehead, raw fish, grouper and Cai Yu, "snakehead has seven stars, which are long and round in shape, with equal head and tail, thin scales, black color and stripes, rather like poisonous snakes, which are odious in shape and cherished by southerners."

morphological character

It is generally 20 cm long and weighs 500 ~ 1000 g. The body is almost cylindrical and the tail handle is thick and short. The head is long, the kiss is short and slightly flat. The mouth is big, the jaw is slightly prominent, and the jaw has sharp teeth. The head and body are covered with scales. The lateral line is interrupted above the starting point of the gluteal fin, and extends down to 1 or 2 rows of scales and then along the middle of the body. The base of dorsal fin and gluteal fin is very long, and there are no spines. The pectoral fin is round. The ventral fin is very small, in front. The caudal fin is round.