If it is a hairy crab preserved at room temperature without special treatment, it cannot be eaten after several hours of death. If it is a low-temperature preserved hairy crab, in this case, although the hairy crab died for several hours, it is generally edible.

1, stored at room temperature: If this is a fresh hairy crab, it can't be eaten at room temperature for several hours after death. Two hours after the crab dies, the total number of colonies will increase sharply. After five hours, protein and fat will decompose obviously, which can produce harmful biogenic amines such as histamine and putrescine. The pathogenic bacteria and harmful substances can not be completely eliminated by cooking and other cooking methods, which may cause gastroenteritis after eating, and are also prone to allergic manifestations under the action of amine substances, which is harmful to human health.

2. Low-temperature storage: Low-temperature storage of hairy crabs commonly sold in the market is one of the measures to extend the shelf life of crabs. Hairy crabs are generally edible if they are kept frozen for several hours after death. However, it is recommended to buy and eat now, and it must be kept frozen before eating to avoid repeated thawing, otherwise it will easily breed bacteria. It is recommended to cook at high temperature, such as steaming, frying and frying. , not raw food.