Yes, the black part connecting the inside and the shell of an oyster is inedible. This part is the internal organs of oysters, which contain many bacteria and undigested impurities and cannot be eaten. The other parts can be eaten.

Oyster, also known as oyster, has the highest zinc content among all foods (every 100g oyster, excluding the weight of shell, contains 87. 1% water and 7 1.2mg zinc, and is rich in protein zinc, so it is a good food for zinc supplementation. You can often eat oysters or protein zinc to supplement zinc. It belongs to the family Oyster, namely oyster and related animals, and is a kind of marine shell. Suitable for oyster culture in subtropical and tropical coastal areas, widely distributed in China. Oysters can be produced from the Yalu River in the north to the coast of Hainan Island in the south. Oysters are soft-shelled parasitic animals, especially those produced in the freshwater border of Yu Xian.