The parts of the oyster that should not be eaten are: the internal organs.

The internal organs of oysters are closely associated with the oyster meat, and after opening the oyster, you will find a black mass, which is generally not recommended for consumption, which is wrapped in the oyster metabolites as well as sediment, which may also contain many heavy metals, so it is generally recommended that the black part of the oyster be removed when handling the oyster before consumption.

There are many types of oysters, about 20 of which are commercially valuable, and the species of oysters available for human consumption are usually from the genus Ostrea and the giant oyster. Oysters are not only fresh, flavorful and nutritious, but also have unique health care functions, making them a seafood treasure with high nutritional value. It is the world's number one farmed shellfish.

Distribution range

Global distribution. China has rich oyster resources and is the hometown of oysters, with a long history of utilizing oysters. As early as two thousand years ago, residents of some areas along the southern coast of China mastered the technology of oyster farming.

At present, there are oyster production bases in the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea, and their main places of origin are Fujian, Guangdong, Shandong, Guangxi, Liaoning and Zhejiang. Among them, the long oyster is the most important cultured species.