Rushan oysters can be eaten raw. Oyster is the largest cultured shellfish in the world and a very common seafood. Rushan oyster grows in the national first-class seawater quality standard culture sea area, with pure water quality, no industrial and agricultural pollution and rich nutrition, which promotes the reproduction and growth of marine basic organisms and provides high-quality bait and excellent growth hotbed for Rushan oyster to eat raw. Rushan Oyster is a specialty of Rushan City, Shandong Province, China, located in Jiaodong area of Shandong Peninsula. Rushan oyster is a kind of cold-water oyster, which grows in mild sea area and needs to grow slowly at suitable temperature, so it has a unique flavor. In order to protect this precious marine resource, Rushan City has taken various measures, including standardizing aquaculture behavior, implementing environmental protection policies and promoting sustainable development models.