1. Oysters usually come from the sea. In recent years, artificial breeding has been started and kept in oyster ponds or ponds;

2. Oysters mostly live in seawater and also exist in freshwater rivers with high salt content;

3. The hard area of the seabed where they live is called oyster bed. These beds are located in deep or shallow seawater or salty estuary waters, and oysters live in the middle of intertidal zone. Oysters are fixed shellfish, usually fixed to shallow sea objects or seaside rocks;

4. Oyster, also known as oyster, has the richest zinc content in all foods, especially seafood 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.