Scientifically known as the Warble-billed Bleak, it is a large, elongated, laterally compressed, willow-shaped body. The back of the head is straight, and the back of the head is bulging. The mouth is superior, and the lower jaw is firm and thick and sharply upturned, erect in front of the mouth, making the mouth cleft vertical. Eyes large and rounded. Scales are small. Bleak belongs to the middle and upper layer of large freshwater economic fish, which is swift in action, good at jumping, irritable and easy to be frightened. Its rapid growth, is to live fish as the main food of the ferocious carnivorous fish, seedling period to plankton and aquatic insects as the main food, more than 50 grams of mainly devour small fish and shrimp, but also devour a small amount of young plants, has a very high nutritional value and economic value.