1. Crabs can still be eaten after they are dead, but it depends on how long they have been dead. If they have died for a short time and have not gone bad, they can still be eaten. Just wash them, steam them and eat them immediately. But crabs after death can't be stored for a long time.

2. If the crab dies for a long time, the tattoo is not fresh at all, and there will be obvious fishy smell, then such crabs can't be eaten. Because the crab will not only rot and deteriorate after a long time of death, but also the oxyacid in its body will release histamine, which can produce a toxic substance to human body. This toxic substance is not afraid of high temperature, and people will absorb a lot of toxic substances even after steaming it, which will be harmful to human health.

Harm and side effects of eating dead crabs

1. Food poisoning

Try to avoid eating those dead crabs in life. If people eat dead crabs, food poisoning is easy to occur, because in the dying process of crabs, the oxoacids in their bodies will be decomposed into harmful substances histamine, which will harm many organs in the human body and cause obvious poisoning symptoms when they are cooked.

2. Breeding parasites

Crabs are originally parasites, and there are a lot of aquatic food, and the parasites in their bodies will multiply in large numbers after the crabs die. However, after using these dead crabs, parasites will enter the body, and they will multiply rapidly in the body, which will lead to high incidence of parasitic diseases and make people suffer from various adverse symptoms such as body weight loss and abdominal pain.

How to preserve crabs

1. Crabs are a kind of animals with strong vitality. As long as they can live for many days after being preserved, the simplest way to preserve them is to tie all the legs and pliers of crabs with hemp rope, put them in the freezer first, and then directly cover them with wet towels, so that they can be kept alive for five or six days and will be fresh after being taken out.

2. Keeping fresh crabs in water is also his most common preservation method. However, when some people keep crabs in water, they will get thinner and thinner. Therefore, when they are kept in water, they must be fed with some egg whites or broken sesame seeds, which will make them fatter and fatter. Just take them out of the water and wash them when eating.