It is necessary to pump oxygen continuously, and the salinity can be adjusted to 1.020- 1.025. Oysters can purify seawater. They mainly eat plankton and organic debris. It is said that each oyster can filter 400 liters of water every day. Some time ago, Japan successfully purified the water quality of Tokyo Port by oyster method. May-June is the breeding season for oysters. If you keep it, you find that the water suddenly turns white and turbid, which is caused by oyster spraying sperm or eggs, and it is easy to lose water and stink. Oyster is another name of oyster, which belongs to a kind of bivalve clam in mollusca, also known as oyster yellow, oyster white, oyster seed, oyster green, oyster, oyster clam and oyster clam.