Hairy crabs are not recommended to be eaten one day after death. Because the crab will produce some harmful substances during its death, which may lead to food poisoning. Hairy crabs are a kind of high-protein food, which will breed a lot of bacteria after death, so it is not recommended to eat hairy crabs one day after death. Generally speaking, hairy crabs are best eaten within two hours after death.

How to judge whether hairy crabs are dead or alive;

1. Smell: Live hairy crabs smell like aquatic plants, and dead crabs smell like amines.

2. Look at the eyes: the eyes of live hairy crabs will move spontaneously when touched, while the eyes of dead crabs will not move by themselves.

3, look at the crab claws: stretch the crab's calf by hand, open it and it will shrink back, indicating that the crab is alive.

4. Spit bubbles: crabs breathe with their gills. When the crab leaves the water surface, part of the water in the gills is discharged from both sides of the mouthparts, and after contacting with air, a certain amount of oxygen is dissolved, and then it is sucked into the body through the small hole below the mouthparts to obtain oxygen.

The less moisture in the cheeks, the more air is inhaled, and the mixture of a small amount of water and air is spit out, which becomes bubbles. So put the crab in half a basin of water, and the crab that spits bubbles means it is still alive.