If the blue crab is alive, freezing is not recommended. At this time, the blue crab tastes the best. If you put it in the freezer, it will freeze to death and the meat quality will change. Therefore, freezing is not recommended. If the blue crab dies, it is more suitable to keep it frozen. After death, the blue crab can reproduce bacteria faster, and frozen storage can make bacteria grow less and keep them for a longer time.

How to preserve the blue crab: If you can't eat it all at once, you can clean it first, then steam it in a pot, put it in a fresh-keeping box, and store it directly in the freezer after the temperature is lowered. When you eat it, you can take it out, thaw it and heat it, so that its meat quality is still fresh and tender, and there will be no deterioration.

If the blue crabs are not steamed, they can also be stored in the refrigerator, which will be better, because the vitality of the blue crabs is still very strong. You can tie its pliers first, then put it in a fresh-keeping box, cover it with a wet towel, and then store it directly in the refrigerator. It won't break or die in about three or five days.

If you want to keep the purchased blue crab fresh, you should put it in water to give it a better living environment. Prepare a deep plastic basin, add some water and salt. If the blue crab is put in water, it will naturally survive for about 7 days to 10 days, and there will be no death.