Urgent+urgent ... Please tell me what "Chai Yu" looks like?

Chai fish is also called mullet, raw fish and snakehead. It is a carnivorous fish, and it is fierce. The front of the mullet body is cylindrical and the back is flat. The head is long, slightly flat at the front and slightly higher at the back. The kiss is short, round and blunt, with a big mouth, an end position, a slightly oblique mouth crack and a slightly protruding jaw. The teeth are small, the upper and lower jaws are banded, and the teeth on both sides of the mandible are firm. Small eyes, high in position, in the first half of the head, very close to the nose and mouth. There are two pairs of nostrils, the front nostril is tubular at the snout, and the back nostril has a small round hole above the eyes. The branchial fissure is large, the left and right branchial membranes are healed, the branchial harrow is short and sparse, and there is an auxiliary branchial organ above the branchial cavity.

The color of snakehead is gray-black, with dark back and head, pale abdomen, irregular black patches on the side and two rows of black stripes on the head. Odd fins have black and white spots, and lateral fins are grayish yellow with irregular spots.

The head of snakehead is covered with medium scale, round scale and irregular scale. The lateral line is straight, the general plan on the anus is twisted, and the scales move down two rows, running in the middle of the body and extending to the caudal base.

The dorsal fin of snakehead is quite long, almost connected with the caudal fin, and there is no hard thorn, starting above the base of pectoral fin and close to the snout. The ventral fin is short, starting below the 4th-5th fin of dorsal fin and ending near anus. The pectoral fin is round, and the tip of the fin extends beyond the middle of the ventral fin. The gluteal fin is shorter than the dorsal fin, and the starting point is below the pain fin 15- 16 fin. The caudal fin is round. The anus is located in front of the anal fin.

The swim bladder of snakehead is single-chambered, slender, with a round front end and a tip extending to the base of gluteal fin. The stomach is cystic and has two pylorus, which are thick and long, about 1/3 of the intestine. The intestine is short and hyperbolic, longer than half of the body length.

Black snakehead subspecies Heilongjiang is characterized by dark green-black back, irregular dark green side, dorsal fin and caudal fin with the same color as back, and light pectoral fin and anal fin.

The main differences between snakehead and spotted snakehead are: snakehead is long and spotted snakehead bowl is short; There are also obvious differences in the markings on their heads: snakehead has seven-star markings on its head, while spotted snakehead has markings similar to "188"; In addition, the head of snakehead is longer and sharper, more like a snake.