Crabs can be frozen. The freezing time is less than three months. Crabs must be frozen when they are alive. If the crab is dead, I suggest you don't freeze it any more, because it is easy to produce histamine, a toxic substance, after the crab is dead. If we take crabs out to eat again, food poisoning is likely to occur, causing abdominal pain and diarrhea.

Generally, the storage time of fresh food should not be too long. Generally speaking, within three months is more appropriate. This kind of fresh food should not be frozen for more than half a year. Due to the phenomenon of freeze-drying at low temperature, it is easy to lose water, nutrition and odor, which affects the quality of food.