About 1 month.

If you cook the crabs and put them directly into a plastic box with the broth, and seal them for freezing, you can usually keep them for about 1 month.

If you have preservation equipment such as vacuum and quick-freezing at home, coupled with the frozen preservation method, its preservation time will be longer, up to about 1 year.

Distinguishing methods:

1, look at the color of the general dead crabs after cooking the back is dark red, the abdomen is grayish white, while the fresh is bright red, bright white abdomen.

2, taste taste dead crabs cooked, most will have a different from the sea smell of stink or ammonia, while fresh crabs cooked is not.

3, measure the hardness of fresh crabs after cooking shell is very hard, vigorously hand pressure will not be concave, dead crabs shell is relatively soft, with a hand can be pressed down.

4, taste taste fresh crab cooked crab meat taste tender, soft; and dead crab meat is loose, soft, no elasticity, may also have a bitter flavor.