Why did the crab die when it was bought home? Can you eat crabs when they are bought and dead?

When I bought it in the market, it was alive, and I added oxygen, 2 hours, will it die?

A: Death. There are several reasons for this:

1.Portunid.

It is a sea-born crab that needs seawater. If you put it in fresh water for a short time, you can live, but soon due to osmotic pressure.

The change will cause the crab body to absorb water and swell to death. The shell can be opened, and its spongy gills can be seen absorbing water and expanding.

2.After being oxygenated and sealed during transportation, the seawater is salted after heating.

The precipitation causes the sea water to deteriorate and become turbid, creating conditions for hypoxia.

3.The oxygen injected during transportation is too pure, that is, the pure oxygen and the concentration is too large, resulting in oxygen poisoning or the use of compressed air with less oxygen content to inject oxygen, so that the oxygen is quickly exhausted, causing breathing difficulties.

And death. 4.When selecting, pick up the fresh enough, and the fresh enough generally can't withstand long-distance transportation.

Usually causes 2 and 3 are more likely.

Now all I care about is can I eat it?

Answer: If sea crabs.

Just dead, the belly crab carapace is not brown or black, and it can be eaten. But be careful, because there is a risk of poisoning if you eat spoiled dead crabs. Floor owner cautious!

After 2 hours of purchase, of course, the crab will die, originally the crab is alive by the oxygen pump, as soon as it leaves the oxygen, it is not adaptable, of course it will die after a long time, of course the dead pike crab can be eaten, the crab that has just died you immediately cook it in a pot, the taste and meat quality are still the same as the live crab, we here buy crabs by the sea to pick the crabs that have just died, and the dead crabs will be sold very cheaply, provided that you can pick crabs.

Summary. Hello, I'm glad to answer for you Crabs are bought alive, and they can be eaten when they die when they go home, this does not affect the nutritional value, there may be differences in taste, it is recommended that you do a good job of cleaning the crabs, there is no problem after high temperatures, don't worry. Usually eat more fruits and vegetables to make the nutrition more balanced.

Hello, I'm glad to answer for you Crabs are bought alive, and they can be eaten when they die when they go home, which does not affect the nutritional value, there may be differences in taste, and it is recommended that you do a good job of cleaning the crabs. Usually eat more fruits and vegetables to make the nutrition more balanced.

螃crab (páng xiè): Animalia, phylum Arthropods, Crustacea, Molluscs, True Softnails, Decapods, Ventral Embryos, Brachycda. It is a crustacean whose body is protected by a hard shell and breathes by its gills.

Taxonomicly, it is the same animal as shrimp, lobster, and hermit crab. The vast majority of crab species live in the sea or near the sea, while some inhabit freshwater or land. They rely on female crabs to give birth to baby crabs, and each time the female crab will lay a lot of eggs, the number of which can reach more than millions.

Crabs rely on the geomagnetic field to determine direction. The history of Chinese crab eating is long, and it is recorded in "Yi Zhou Shu, Wang Hui Jie" and "Zhou Li, Tianguan, Baoren". The genetic material of such organisms is complex and highly varied, often as many as more than 100 pairs.

Common crabs include hairy crabs (river crabs, hairy crabs, clear water crabs), pike crabs, etc. The resources of crabs in China are very rich, among which the hairy crabs produced by Gucheng Lake hairy crabs, Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, Yangcheng Lake hairy crabs, crab trembling sea crabs, Xinghua hairy crabs, and Hongze Lake hairy crabs in the lower reaches of the Yangtze River are the top grades.

1. Crabs must not be eaten when they are bought and died.

2. Crab is a scavenger with strong immunity, eating a lot of bacteria and viruses, but they are suppressed by the crab's immunity, once the crab is dead, not even dead, just dying, bacteria and viruses will multiply in large numbers and breed some biological toxins. Because crabs like to eat decaying substances such as animal carcasses, their gastrointestinal tracts often contain pathogenic bacteria and toxic substances, and once they die, these germs multiply in large numbers; In addition, the crab body also contains more histidine, histidine is easy to decompose, can produce histamine and histidine-like substances under the action of decarboxylase, especially when the crab dies, histidine decomposition is more rapid, with the longer the crab dies, the more histamine accumulates in the body, and when histamine accumulates to a certain amount, it will cause poisoning. As long as you see the crab half-dead and unmotivated, it's best not to eat it.

3. If people eat such crabs, it will cause food poisoning, dehydration, electrolyte disorders, convulsions, and even shock, coma, sepsis, etc., and the common manifestations are nausea, vomiting, abdominal pain, and diarrhea.

4. Some people may ask, after the crab is cooked, isn't the crab still dead? Aren't you still eating dead crabs? Why can't crabs be eaten if they die naturally?

5. If the crab dies naturally, the toxins in the body will multiply, and these toxins will also decompose the crab meat, and for the crabs that are doing it themselves, the toxins in the body have been discharged, and they have undergone high temperatures, which effectively prevent the spread of bacteria and better play a role in killing bacteria.

6. And after the water is boiled, boil it for another 20 minutes, so that the bacteria in the crab meat can be killed, the crab tastes very delicious, but if it is a crab that dies due to improper preservation, it is better to send it directly to the trash, for your own health, but also for the health of your family.

7. Although the nutritional value of crabs is rich, and there are many particularities about eating crabs, crabs must not be eaten when they die. If you are a crab lover, you should keep in mind the precautions for eating crabs, so as not to affect your health.

8. How to choose crabs: When you leave the water, you will spit live crabs.

9. After the crab is obtained, it often causes an increase in lactic acid in the body because it wants to break free, which will cause the bacteria in the body to multiply rapidly and spread to the crab meat after the crab dies. Bacteria will break down amino acids in crabs, and then produce a harmful substance "histamine", causing allergic food poisoning; In addition, the substances that may be produced are "histamine-like", which can cause vomiting, abdominal pain, and diarrhea, so be careful when selecting.

10. When buying crabs, you must buy them alive, because dead crabs contain a certain amount of toxicity, which is very bad for our body. Because when the crab is dead, the histidine in the crab's body will decompose to produce toxic histamine, and the toxin produced by the crab will continue to increase with the time of death. Therefore, when buying crabs, you must choose live ones.

Summary. Crabs can't be eaten when they die, which not only affects the taste, but may also cause some damage to our body. In general, it is best not to eat dead crabs.

Crabs are fond of eating rotten food, which accumulates bacteria and toxic substances in its body. Dead crabs can harbor a large number of bacteria in their bodies, making them unsuitable for consumption, especially in hot weather. In terms of taste, the crab loses its original umami after it dies.

Crabs can't be eaten when they die, which not only affects the taste, but may also cause some damage to our body. In general, it is best not to eat dead crabs. Crabs are fond of eating rotten food, which accumulates bacteria and toxic substances in its body.

Dead crabs can harbor a large number of bacteria in their bodies, making them unsuitable for consumption, especially in hot weather. In terms of taste, the crab loses its original umami after it dies.

It is not recommended to eat it. It's okay to just die for a while.

The crab you just bought dies and you can't eat it anymore. Dead crabs contain a lot of harmful substances, and eating them can seriously damage your health, so it is best not to eat dead crabs.

Dangers of eating dead crabs:

1. River crabs mostly grow in dirty river ponds, and like to eat dead fish, dead shrimp and other rotten animal carcasses in the water, so it is easy to be infected with bacteria, and generally crabs are stained with a large number of microorganisms inside and outside. When alive, the crab can excrete bacteria from the body through metabolism, and once it dies, the bacteria in the body will multiply in large numbers, decompose the crab meat, and some bacteria will also produce toxins.

2. Crabs contain more histidine, which is easy to decompose, and histamine and histamine-like substances can be produced under the action of decarboxylase. Especially when the crab dies, the histidine decomposes more rapidly, the longer the crab dies, the more histamine accumulates in the body, and when histamine accumulates to a certain amount, eating it will cause poisoning.

3. Crabs contain a lot of protein, and after it dies, the proteins in the body will decompose ammonia. After the dead crab is ingested into the human body, the excessive amount of ammonia must be excreted through the body, which can cause health harm in this process.