Protect and regulate China's oyster resources

China has at least 30 oyster species, all of which provide valuable ecosystem services. Oysters’ filter feeding habit reduces suspended particles and nutrients. One hectare reef can clean a volume water equivalent to nearly 15 Olympic swimming pools daily. excrement stimulate denitrification by removing nitrogenous organic matter, helping mitigate eutrophication. Natural reefs habitat for many enhancing biodiversity increasing fisheries. Oyster reduce impacts waves caused hurricanes typhoons, stabilizing shorelines. Despite their ecological importance, 85% globally have been degraded since the 19th century overharvesting, coastal development, pollution, disease. China’s reefs, especially those in Tianjin Jiangsu, seriously damaged during recent decades. Urgent action Chinese authorities is required protect these crucial species.