Crab is a lot of people like to eat seafood, a fall, the crab is ripe, people around the country are scrambling to eat crab, Yangcheng Lake hairy crabs, Qingdao pike crabs, etc., a variety of crabs on the market, dazzling. However, when buying crabs, there are times when you will encounter dead crabs, then the boss will say cheap to sell you, and even buy more than free to send you, this crab in the end can not want it?

Dead crabs in the end can not eat it?

The answer is certainly not eat, and resolutely can not eat. Why is this? Listen to my slow analysis, I think the dead crab can not eat the following reasons:

First: dead crab body contains a large number of bacteria that can not be decomposed. Crabs live in the sea, most of the algae or sea dead fish and shrimp for food, these rotten dead fish and shrimp contain a lot of bacteria, under normal circumstances, the crab can be metabolized through the discharge of these bacterial debris; if the crab dies, the metabolism stops, the belly of the bacteria will reproduce in large numbers, and step by step to erode off the flesh of the dead crabs, we can't be observed with the naked eye;

Secondly, dead crabs will produce a new type of bacteria called "bacteria", which is called the "dead crab". Crabs will produce a toxin called "histamine". When the crab dies, a large number of reproducing bacteria will decompose the amino acids in the crab's body, which in turn produces a toxin called "histamine", which is a biogenic amine that binds with receptors on target cells to produce a biological response, stimulating the human body to react, such as diarrhea, vomiting, nausea, panic attacks and other symptoms. Histamine is a biogenic amine that binds to receptors on target cells and produces biological reactions that stimulate the body to react, such as diarrhea, vomiting, nausea, panic and even shock, which may be life-threatening in severe cases. Some people think that boiling crabs for a longer period of time can kill the bacteria in the crabs, but the toxin "histamine" will not be killed even at high temperature;

Thirdly, dead crabs are easy to deteriorate and change flavor, which affects the taste. Dead crabs contain a large number of bacteria, these bacteria continue to reproduce, decomposition of the protein in the body of the crab, after a long time, it will lead to decay and spoilage of crabs, the smell is very strong, even after the treatment of clean cooking, will affect the taste.

So, when you meet dead crabs in the market, you can't buy them and you can't ask for them, and if you buy them back after they die, you can't eat them.

Dead crabs can't be eaten, so can the whole live crabs be eaten?

The answer is also negative, not all parts of the crab can be eaten, the following parts of the crab is not edible, eat before you need to deal with it:

1.crab gills. After the crab is turned over and the triangular shell is broken off, there will be two rows of tissues like brush hairs, which is like the lungs of living creatures and belongs to the respiratory organs, used to filter out the impurities in the water, therefore, a large number of bacterial sundries will be deposited on the gills of the crab, which is inedible;

2. As the name suggests, the crab intestine is used to excrete products, just like the shrimp thread, which is black in color and contains a large amount of excrement and toxins, therefore, it is also inedible;

3. Like the crab intestine, the crab stomach is used to digest and decompose the food ingested by the crab. Since crabs mostly feed on dead fish and shrimp, the crab stomach contains a large number of bacteria and should not be consumed;

4. Crab belongs to the cold food, crab heart cold, long eat into the human body, will cause the body cold hands and feet, especially women, menstruation is easy to cause menstrual cramps, uterine cold, etc., therefore, also can not be eaten.

How should I pick crabs in the market to avoid buying dead crabs?

Consumption of dead crabs can cause great harm, and over-consumption can even be life-threatening. Therefore, how to avoid buying dead crabs when buying crabs in the market is an essential skill that everyone must learn. I think when picking crabs you can judge the vitality of crabs from the following aspects:

First: look at the crab eyes. When selecting crabs, use your hand to touch the eyes of the crab, if the eyes contract and turn, proving that the crab vitality, long survival time, on the contrary, if it is no reaction after touching, it proves that the crab is dead or dying, such crabs can not be bought;

Secondly: whether to spit bubbles. Because the crabs use the crab gills to breathe, when there is no water, the crabs will suck in a lot of air, and the gills mixed with the water, will produce a lot of bubbles, therefore, the crabs out of the water, if the crabs in front of a large number of bubbles, it proves that the crabs can still breathe, belonging to the live crabs; on the contrary, if it is not able to produce a bubble, it proves that for the dead crabs;

Third: to get to the tip of the nose to smell a smell. Dead crabs, due to the body contains a large number of bacteria, will decompose the body of the crab lead to rotting and deterioration, therefore, smell can also identify whether the crab is fresh and alive.

Conclusion

In summary, dead crabs contain a large number of bacteria in the body, and will decompose to produce a toxin called "histamine", which can not be destroyed at high temperatures, therefore, dead crabs can not be eaten, in addition to dead crabs can not be eaten, the crab gills, crab intestines, the crab stomach, and the crab heart can not be eaten as well. It is vital to learn to recognize whether the crabs sold in the market are dead or alive. Therefore, it is important to consume safe crabs for your health.