Oyster (scientific name: Ostrea gigas tnunb) is a bivalve pearl oyster, mainly distributed in temperate tropical seas. It is one of the most stress-resistant aquatic animals. It sticks to other objects with its shell and feeds on microscopic algae and organic debris in the ocean. Its shell is secreted by the mantle below. The mantle extends from the top of the shell to the ventral edge. It is two layers of epithelial cells with a membrane formed by connective tissue in between. There are muscle fibers in the membrane to attach it to the inner surface of the shell. The mantle The edge of the membrane is thickened to form three folds, and there are radial muscles and circular muscles on the inner folds to keep the edges close to the shell.

Life habits

Persistent life

It is fixed by sticking its shell to other objects. [1] Generally distributed in the intertidal zone and subtidal zone where the water depth does not exceed 10 meters. [3]

Stress resistance

Oysters are also one of the most stress-resistant aquatic animals. The changing environment of the intertidal zone over 200 million years has trained oysters to respond to temperature, It has extremely strong resistance to salinity, dew and common pathogens in sea areas. When the tide comes out of the water, it can withstand the hot and dry weather in summer. It can also successfully adapt to freezing weather in winter and can survive 1~ out of water and dew. 2 weeks or even 1 month. [3]

Gender reversal

In natural populations, most oyster individuals are dioecious, and a small number are hermaphrodites. Oysters can also spontaneously "transgender", and the same individual can "transgender" spontaneously. Different genders appear in different years or under different environmental conditions. [3]

Food Habits

Filter feeding. [1] Feed on microscopic algae and organic detritus in the ocean. [3]

Distribution range

Oyster

Globally distributed. China is rich in oyster resources and is the hometown of oysters. It has a long history of utilizing oysters. As early as more than 2,000 years ago, residents in some coastal areas in southern China mastered oyster farming technology. At present, there are oyster production bases in the Bohai Sea, Yellow Sea, East China Sea, and South China Sea. Their main producing areas are Fujian, Guangdong, Shandong, Guangxi, Liaoning, Zhejiang, etc. Among them, long oyster is the most important cultured species.