It is a filter-feeding animal, which can suck seawater into its mouth and filter algae and debris to eat. When seawater is discharged, oysters have strong resistance to stress and can survive for a short time after leaving water.

Oyster is another name for oyster, which can filter microorganisms, including bacteria, viruses, fungi and some small protozoa.

Oysters are delicious.

Oysters have been cultivated and eaten since BC, and pearls can be produced in the mantle of pearl oysters. The two shells of oysters are different in shape, and the surface is rough and dark gray. The middle part of the upper shell is convex, and the lower shell is attached extensively, large, flat and smooth. The inner surfaces of the two shells are white and smooth, and the two shells are connected by an elastic ligament at the narrower end. There is a powerful adductor muscle in the middle of the shell to resist the tension of the ligament. When the shell is slightly opened, the water flow is introduced into the shell through the wave motion of cilia.

There are more than 1000 kinds of oysters. Guangzhou oysters are big, and one is as big as a cigarette case. But the bigger the oyster, the better it tastes, which varies from person to person. Fujian Lianjiang's oysters are moderate in size and are recognized by the majority of foodies. In Fujian, it is usually called oyster, which is called sea milk because of its delicious taste, rich nutrition and high zinc content. Oysters are widely cultivated in coastal areas of China, and there is a great market demand. The largest number of oysters in Fujian is in Dongshan area of Zhangpu, which supplies more than half of the market in China.