Crab is divided into sea crab and river crab, generally speaking, sea crab dead, as long as it is chilled, can eat, sea crab out of seawater survival time is very short, generally are out of the water immediately after the freezing of fresh. I grew up in Zhoushan, Zhejiang seaside, the market will often sell just fished up dead pike crabs, because relatively fresh and live is cheaper, so the local people will often rush to buy. So eating dead sea crabs, such as pike crabs these are no problem.
If the frozen pike crabs, the transportation of ice water has not been completely melted, or the box feels still a little cold feeling, that the crab is still fresh, it is recommended to put into the freezer immediately after arriving home. Remember that it is a freezer not a refrigerator. After one day, if you want to eat it on the second day, you can take the crab out of the freezer and put it into the refrigerator, and then you can eat it after thawing. In fact, frozen pike crabs are best salted with salt, and then put into the freezer, when you want to eat take out a few, in the frozen state with a knife to cut the crab is very good to cut, and also have the type.
But! River crab dead is absolutely not eaten. Because river crabs multiply the toxins in their bodies in the process of dying, the toxins in the body of river crabs that die naturally or are close to death can reach a level that can cause harm to the human body. This secretion is called histamine, which is a poisonous substance. With the prolongation of the time of death of the crab, the accumulated histamine in the body will become more and more, and the toxicity will gradually worsen, and even if the crab is boiled, the histamine is not easy to be destroyed. And the excessive ammonia nitrogen must be discharged from the kidneys, so it is bad for the kidneys to cook and eat dying or dead crabs. People who eat dead crabs may experience abdominal pain, vomiting, diarrhea and these conditions.
Of course rotten crabs, no matter which kind can not eat Oh!
Remember! Those who eat raw or undercooked crabs for the sake of freshness are equally harmful to the human body. Because of the live crab body of Schistosoma larvae infection rate and infection is very high, Schistosoma parasites in the lungs, stimulate or
According to the results of an expert survey - the crab a little heated to eat, the rate of infection of Schistosoma 20%; to eat the crab after pickling, Schistosoma infection rate of up to 55%, eat crabs, Schistosoma infection rate of up to 71%. This shows that eating crabs must be steamed through, not half-cooked state or raw crab state to eat.
So how to judge whether the crab you buy is dead?
To see, smell and pinch
One look: look at the color
Fresh crabs cooked back bright red, bright white abdomen, while the dead crabs back dark red, gray abdomen, gray color.
Smell: dead crabs have a corrupt flavor
Live crabs cooked taste fresh seafood flavor, if you think the crab itself is very stinky, that taste should be the fishy smell of seafood, such as smell used to it, you will not feel the fishy smell; and the dead crabs due to its meat has been corrupted, corrupt meat cooked will have a special smell, different from the rancid smell of the rice deterioration.
Three pinches: dead crabs will be soft after cooking, the meat will be loose
Live crabs are cooked after the shell is hard, hard finger pressure, the shell will not be sunken, while the dead crabs due to the meat began to rot, so the crab shell will become soft, gently pressed with the hand will be sunken.
Summary! It's important to buy crabs carefully and recognize the brand!
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