It is edible. Oysters are edible if they are not spoiled after freezing. Oysters can replenish electrolytes. It can strengthen the liver and also have a certain cosmetic effect. It tastes delicious, has high nutritional value, contains protein, has low fat content and is easy to digest. The body of oysters is particularly rich in zinc. It can supplement zinc to human body, and is very suitable for people with zinc deficiency. Oysters can improve sexual function to some extent. It is very beneficial for male patients with impotence, prostate and other diseases. It also contains an acid, which can enhance the function of the liver, play a role in detoxification and enhance resistance. It is very good for treating patients with iron deficiency anemia. It can also play the role of beauty beauty, prevent skin dryness, and decompose melanin. Generally speaking, the storage time of fresh oysters in the refrigerator is about 1 month, but if they are frozen in the refrigerator for one year or more, the nutrients in oysters may have lost a lot, and they may have gone bad and spoiled, which may cause uncomfortable reactions after eating, especially for people with gastrointestinal discomfort. Therefore, it is generally not recommended to continue eating oysters if they are frozen for a long time.