Domestic: There are several large fish farms in our country, including the Bohai Bay fish farm at the mouth of the Yellow River, the Zhoushan fish farm at the mouth of the Yangtze River, and the fish farm at the mouth of the Pearl River. These are important fish farms in our country.

Foreign: The fish farms at the mouth of the Nile River, the Canadian fish farms at the mouth of the five Great Lakes in North America, and the fish farms at the mouth of the Amazon River. These fish farms are rich in fishery resources and have developed industries.

Estuary fish farms.

Fishing grounds refer to waters with fishing value where fish or other aquatic economic animals densely pass through or linger. As the environmental conditions for spawning, feeding, fattening, or wintering temperature change, they gather in groups in certain seasons to swim through or stay in a certain water area, forming relatively concentrated places with fishing value in fishery production.