It is edible.

In shellfish, oysters are the only 100% shellfish meat can be eaten, the viscera can also be eaten, but the viscera contains oyster metabolites, sediment, and a lot of bacteria, and there will be a relatively fishy, so if you want to eat with the viscera must be cooked and eaten, should not be eaten raw, otherwise it is easy to cause gastrointestinal discomfort, is not good for your health.

Any creature has an internal organ, oysters are also a common marine life, it will also have internal organs, oysters after cutting open, white meat in the middle of a black-green part, that is, oysters viscera.

Expanded Information:

Oysters are rich in a large amount of protein and zinc, which the human body lacks. Eating oysters can prevent skin dryness, promote skin metabolism and decompose melanin. It is a rare holy product of beauty. But the U.S. Food and Drug Administration (FDA) considers raw oysters to be among the highest-risk foods.

Because oysters contain two highly destructive pathogens: Norovirus and Vibrio cholerae. Norovirus can cause gastroenteritis. Vibrio cholerae can cause high fever, infectious shock, ulcerative blisters on the skin, and even deadly sepsis. "

Raw food is not recommended. If you feel sick after eating it raw, please seek medical attention, usually no antibiotic treatment is needed, just timely rehydration and rest.

Baidu Encyclopedia - Oyster (Mollusk)