You can eat. Oyster is a kind of marine edible shellfish, which carries a lot of bacterial substances. If it is out of seawater for a long time, it is very easy to die and deteriorate, and the frozen environment in the refrigerator can inhibit the proliferation of bacteria to a certain extent and prolong the storage time of oysters. Therefore, if oysters are well preserved in freezing and do not deteriorate, they can continue to eat. Precautions for eating oysters: 1. When buying oysters, buy oysters with completely closed shells, not oysters with open shells; 2. If you choose to cook, the shell of the oyster should be cooked thoroughly, and it is best to cook for 3-5 minutes after opening the shell; If you want to steam, wait until the water is completely boiled before putting the oysters. After the shell is completely opened, steam for 4-9 minutes. 4. At the same time, it should be noted that in the process of cooking oysters, try to use a small pot to avoid cooking too much in a too big pot at a time, otherwise it may cause the oysters to be unevenly heated, so that some oysters cannot be cooked.