When hairy crabs are dying or dying, the rich nutrients in them, such as protein and fat, will become the nutrients of bacteria, which will lead to a large number of bacteria breeding. At the same time, protein will be decomposed into cadaverine and histamine, which are toxic and will lead to poisoning, and histamine will lead to allergies, such as numbness of limbs, skin allergies, general weakness, and even allergic phenomena such as asthma and dyspnea.
The way to see the life and death of hairy crabs:
1 Look at the hairy crabs whose eyes are tied. If you can't judge whether they are alive or not, you can touch the hairy crabs' eyes to see if they will blink, and what will blink is alive.
2. Look at spitting bubbles. You can also put the hairy crabs into the basin, and then add water that does not reach the mouth of the hairy crabs. If you spit bubbles, it means that the hairy crabs are alive.
3. Look at the thinnest part of the crab claw. When judging whether it is a fresh crab. You can break the thinnest part straight with a little force. If the crab claws quickly return to the bent state, it means that the hairy crabs are alive.
4. See if you can crawl. If you really can't judge whether it is alive or not, you can put the hairy crab in the basin, then untie the rope that binds the hairy crab and move it to see if it will move.
Extended data
Five taboos for eating crabs?
1, do not eat dead crabs?
The parasitic bacteria in the dead crab will multiply and spread into the crab meat, which will cause protein to decompose and produce histamine. The longer the crab dies, the more histamine accumulated in the body, and the greater the toxicity. Even if the dead crab is cooked thoroughly, the toxin is still not easy to be destroyed, and after eating it, it will cause nausea and vomiting, flushing on the cheeks and rapid heartbeat.
2. Don't eat crabs overnight?
Crab is a food containing more histamine acid. Histidine of the leftover crab species overnight will be decomposed into histamine under the action of some vitamins. Heating it back to the pot can kill pathogenic microorganisms, but it can not destroy toxins, resulting in histidine poisoning. Therefore, you must remember to eat crabs, and it is best to steam them now, and the longest time is no more than 4 hours. ?
3. Do not eat raw crabs or drunk crabs?
Crabs contain various pathogenic microorganisms. In particular, the eggs of Paragonimus larvae in its body are highly infected and have strong resistance, which can not be killed by soaking in yellow wine and white wine alone. Eating raw crabs and drunken crabs can easily induce paragonimiasis and cause cough and hemoptysis. If the virus enters the brain, it will also cause paralysis. Eating crabs is exquisite, so we must carefully choose crabs when buying crabs. ?
4. Don't eat crab "four parts"?
Crab stomach is a triangular bone packet in the crab cover. Eat the crab cover first, scoop out the middle crab stomach with a spoon, and gently suck the crab yolk wrapped outside. For the crab body, first cut off the redundant crab feet and mouth with scissors; Pick out a hexagonal piece in the middle of the crab with a spoon handle, which is the heart of the crab and should be discarded; Crab intestine, a black line from crab stomach to crab navel; Crab gills, two rows of soft things like eyebrows that grow on crab abdomen, should be removed. ?
5. Not equal to tea, persimmons, peanuts and cold drinks?
Crab and tea can't be drunk at the same time, because tea will dilute gastric juice. Tea and persimmon contain more tannic acid, which will coagulate protein in crab meat, which is not conducive to digestion. Solidified substances will stay in the intestine for a long time, which can cause abdominal pain, vomiting and diarrhea after fermentation. Peanuts have high fat content, and greasy things will be eaten together with cold crabs, which will easily lead to diarrhea.
Phoenix. com: Online shopping for hairy crabs is only 1 Only live dead crabs contain "crab venom" and should not be eaten.