Grass carp is generally referred to as grass carp. It is a typical herbivorous fish, inhabiting the rivers and lakes in the plains, generally preferring to reside in the middle and lower water and near-shore areas with more water plants. It is active, swims quickly, and often forages in groups. The young grass carp eats larvae, algae, etc. The grass carp also eats meat, such as earthworms, dragonflies, etc. The fish is widely distributed. It is widely distributed in China, from Heilongjiang to Yuanjiang in Yunnan (except Tibet and Xinjiang). Has migrated to Europe, the United States, Africa and other continents, is China's important freshwater aquaculture fish, it and bighead carp, bighead carp, mackerel together, constituting China's "four big fish".