Hucho taimen is an extremely precious large carnivorous and fierce fish, with a body length of 1-2 m in youth and 2-5 m in adulthood, among which the old star "Big Mac" can grow to more than 10 m and weigh 1-2 tons. Body length, slightly flat, cylindrical. The head is flat, the nose is pointed, the mouth is cracked, and it is in the end position. The maxilla is obvious and free, and extends backward to the posterior edge of the eye. There are sharp teeth inclined inward on the upper and lower jaw, vomer and tongue. The scales are extremely small and oval, and the rings on the scales are arranged clearly, without radiation grooves, with lateral line scales 193-242 pieces and complete lateral lines. Lipid fins are well developed. The back is bluish brown and the abdomen is silvery white. There are many small dark black cross-shaped spots on the head and side of the body, which are as dense as millet. During the spawning period, both sexes show bronze color, and the lower leaves of ventral fin and caudal fin are orange-red, especially for male fish. Pyloric caecum 205-2 19.