1, herring is a kind of blue fish, which is mainly distributed in the plain area south of the Yangtze River in China and rarely seen in the north of the Yangtze River; It is an important fishery resource in the middle and lower reaches of the Yangtze River and lakes along the Yangtze River, and is the main breeding object of lakes and ponds. It is one of the four largest freshwater fish in China.

2. Black herring is mainly produced in the Yangtze River valley, but it can also be cultured artificially. However, due to the limitation of the source of fish food, there are few fish raised in the north, which are produced in all seasons, but the most fish are produced in autumn with the best quality. The snakehead is thick and tender in meat, delicious in taste, rich in fat, with large but few thorns, and is the top grade of freshwater fish.