Black carp, grass carp, silver carp, bighead carp. 1, herring, also known as black pomfret, has large scales all over its body, and its scales and fins are grayish black, hence the name. Mainly distributed in the plain area south of the Yangtze River in China. Black herring usually lives in the middle and lower layers of water and is inactive by nature. Its main food sources are snails, clams, clams and so on. , occasionally preying on shrimp and insect larvae. Herring is delicious and deeply loved by people. It is regarded as a first-class edible fish and has high economic value.

2. Grass carp, also known as pomfret, pomfret, grass pomfret, pomfret, grass carp, grass roots (northeast), hybrid fish, black herring, etc. Grass carp (Ctenopharyngodon idellus) is a typical herbivorous fish, which lives in rivers and lakes in plain areas, and generally prefers to live in the middle and lower layers of water bodies and coastal areas with more aquatic plants. Sexually active, swimming fast, often foraging in groups. Grass carp is an excellent cultured fish and one of the four traditional freshwater cultured fish in China. It has high economic value because of its simple food, wide source of feed and tender meat.

3. Silver carp, also known as silver carp, bream, silver carp, silver carp and silver carp, are mainly distributed in major water systems in China. The shape is similar to that of bighead carp, and silver carp is impatient and good at jumping.

4, bighead carp, also known as silver carp, silver carp, _ fish, chub head fish, Baotou fish, bighead carp, black silver carp, hemp silver carp, and also male fish. Mainly distributed in freshwater lakes, rivers, reservoirs and ponds in China. From fry to adult stage, it is a typical fish that feeds on plankton, mainly on zooplankton and phytoplankton.