It is common sense that you cannot eat crabs after they die. First of all, everyone must understand why you cannot eat crabs after they die?

Because crabs are bottom scavengers, there are many bacteria in their digestive glands such as intestinal glands.

After the crab dies, under the appropriate environment and over a certain period of time, bacteria will multiply in large numbers.

The digestive glands rupture, and heavy metal substances come out of the digestive glands to contaminate the crab meat;

At the same time, bacteria decompose the protein of crab meat and crab roe into toxic histamine, which causes poisoning after consumption.

If there is no environment for bacteria to multiply rapidly, or there is not enough time to multiply, the crabs are still fresh and can be eaten. First of all, everyone must understand why crabs cannot be eaten after they die?

Because crabs are bottom scavengers, there are many bacteria in their digestive glands such as intestinal glands.

After the crab dies, under appropriate circumstances and over a certain period of time, bacteria will multiply in large numbers.

The digestive glands rupture, and heavy metal substances come out of the digestive glands to contaminate the crab meat;

At the same time, bacteria decompose the protein of crab meat and crab roe into toxic histamine, which causes poisoning after consumption.

If there is no environment for bacteria to multiply rapidly, or there is not enough time to multiply, the crabs are still fresh and can be eaten.

Crabs should generally be chosen with vitality, which will naturally taste better. The sea crabs that everyone usually eats can usually be bought as dead crabs in supermarkets. Even in coastal cities, dead sea crabs in supermarkets are refrigerated and sold at a discount. Since sea crabs live in seawater for a long time, they are quickly refrigerated after death or caught and transported to other places for sale in cold chains, which generally do not deteriorate. It is edible as long as there is no peculiar smell. (Because the reproduction rate of bacteria is greatly slowed down in the presence of refrigeration and salt.)

Freshwater crabs such as hairy crabs are generally inedible after death. But it also depends on the situation:

1. For example, the crab was alive when you got it, but died after being cooked, or it crawled out of the pot and fell to death while cooking. This kind of crab, which was originally very vital, died abnormally due to various reasons. They were thrown to death by couriers, were killed by children playing with them, were killed by crawling and falling around, and people were pinched and then swatted crabs to death in anger. These are all edible (the bacteria are killed during the cooking process before they can reproduce)

2. After receiving the hairy crabs, the crabs were lifeless and felt like they were about to die. This kind of crab is generally edible. The crab has no vitality. In most cases, it is because it is fainted by the cold.

3. After receiving the hairy crab, the crab died (confirmed that it was not freezing shock). If the ice water in the express box has not melted away, it can be eaten after cooking and making sure that the crab intestines are not broken. (The reproduction rate of bacteria is greatly reduced at low temperatures)

4. The crab is not dead yet, but is dying. After the crab meat is cooked, it will not be full, it will be empty, taste like chewing gum, and cannot be eaten. This kind of crab itself does not have strong resistance. Generally, the crab intestines are broken but it still fights tenaciously. Crabs that are dead or dying under such natural conditions should generally not be eaten. Sellers generally do not ship this kind of crabs because they have to pay for dead crabs.

5. In other situations, such as the death of a crab.