Oysters grow in the sea. They have shells on both sides, and usually one side is attached to the rock. Oyster (mD li) is also called oyster (háo). Oyster (Ostrea gigas thunberg), a family of animals, is produced in Zhanjiang, Guangdong, Nantong, Jiangsu, small coastal oysters (large-scale culture) in Xiaoyushan Town, Sanmen County, Zhejiang Province, oysters in Dalian Bay or oysters in Jiangsu Province. It can be harvested, fleshed, washed and dried all year round.

Oysters fix shellfish. Generally, it is fixed on shallow sea objects or seaside rocks, and eats and breathes by opening and closing shells. As filter-feeding organisms, they mainly feed on micro zooplankton, diatoms and organic debris. Oysters generate airflow in water by vibrating cilia on gills, water enters gills, and suspended particles in water are stuck by mucus. Cilia and tentacles on cheeks classify particles according to their size. Then the small particles are sent to the mouth, and the large particles are transported to the edge of the film and thrown out.