Oysters grow on oyster beds. The hard area of the seabed where oysters live is called oyster bed, which is located in deep or shallow seawater or salty estuary waters. Oysters live in the middle of intertidal zone. Mainly distributed in tropical and temperate zones. China produces about 20 species from Bohai Sea, Yellow Sea to Nansha Islands, mainly including pleated oyster, compact oyster and long oyster.

Oysters and related animals are all marine shells. Suitable for oyster culture in subtropical and tropical coastal areas, widely distributed in China. Oysters can be produced from the Yalu River in the north to the coast of Hainan Island in the south. Oysters are soft-shelled parasitic animals, especially those produced in the freshwater border of Yu Xian.

Oysters are mollusks. They have two shells, one is small and flat, the other is big and bulging, and the surface of the shell is uneven. Meat can be eaten and oyster sauce can be made. Meat, shell and oil can be used as medicine, also called oysters or oysters.