Procypris rabaudi (scientific name: Procypris rabaudi) is a fish of the genus Procypris in the family Cyprinidae. It is commonly known as water carp, black carp, rock carp, and black carp. It is a unique species in China. In the fishery in the upper reaches of the Yangtze River, the economic value is relatively high. The yield is not high, but it has the advantages of small body cavity, tender meat, and delicious taste. It is a high-quality economic fish that people love. With the increase in dams and gates on tributaries in the upper reaches of the Yangtze River, it has blocked the migration path of Iwahara carp to their spawning grounds; moreover, high-intensity fishing, especially large-scale electrofishing, has extremely serious damage to its resources; in addition, sewage discharge from factories along the river Due to the influence of dangerous factors such as deterioration of water quality, the growth rate of this species of fish is relatively slow, and the population cannot be replenished in time, so the wild population is tending to decrease year by year.