Black herring, also known as snail green, is mainly distributed in the plain area south of the Yangtze River in China. It is an important fishery resource and breeding object. It grows rapidly and tastes delicious, and is deeply loved by people in China. However, after being introduced to the United States, it has seriously damaged the local ecological environment and become an alien invasive species.

2. Grass carp

Grass carp is called sea bream in the south of China and grass root in the north. It mainly inhabits rivers and lakes in plain areas. It is a typical herbivorous fish. Because of its rapid growth and wide feed sources, it is the main freshwater fish breeding object in China. Because of its special habits, grass carp has been transplanted as pioneers all over the world.

3. Carp

Cyprinus carpio, also known as Cyprinus carpio and Cyprinus carpio, originated in Asia. It is one of the most diverse, widely distributed and cultured freshwater fishes with the longest history. It is an omnivorous fish with strong adaptability due to its cold tolerance, alkali tolerance and hypoxia tolerance. After it was introduced to the United States, it was once flooded because of few natural enemies and the fact that local people didn't like to eat it, but it was a delicacy in China.

4, whitebait

Whitebait is the general name of many translucent fishes of the genus Whitebait, mainly distributed in salt water and fresh water in East Asia. In China, whitebait is also called noodle fish and firecracker fish, which is a rare delicacy. Whitebait itself is rich in nutrients and is the first choice for the weak. However, due to its carnivorous diet, it is easy to destroy the ecosystem if there are few natural enemies.

5, crucian carp

Carassius auratus, also known as crucian carp melon seeds and native crucian carp, is mainly distributed in Europe and Asia. It belongs to a common freshwater fish with miscellaneous feeding habits, mainly feeding on aquatic plants and plankton. Because its fish is rich in trace elements and minerals, it is a delicacy on the table and has strong adaptability. It has been introduced to all parts of the world.