Generally hairy crabs are edible after freezing. It can probably be kept for about three months, but it is not recommended that crabs be frozen for too long to avoid loss of nutrients. The key components in hairy crabs are water, protein, fatty acids, carbohydrates, vitamins and minerals and a series of other substances, crabs directly frozen, most of the nutrients inside are retained, of course, there will be a loss of some nutrients. Although there is a partial loss of nutrition but still can be eaten. However, you should pay attention to whether the hairy crabs have spoiled, if there is a spoiled condition, you can not eat it. People who are allergic to hairy crabs should not consume hairy crabs, and should consult a doctor if allergic symptoms such as skin itching occur after consumption.