It mainly depends on how long the crabs have been dead and the environment in which they were kept.
1. If the crab is dead at room temperature of 20 or 30 degrees, then it can't be eaten for more than two hours, because the crab may still carry bacteria, parasites and sludge and other filth, coupled with the rich content of protein and fat in the crab, the dead crab can easily become a nutrient for bacteria, and be decomposed to produce cadaver amine, histamine and other harmful substances that can jeopardize human health.
2. If the crabs have been kept in the refrigerator, then even if they are dead, the bacterial reproduction will be inhibited by low temperature, and they can still be eaten within 1-2 days of death in general.
2What happens when you eat dead crabs
1. Food poisoning reaction
The crabs that have been dead for more than two hours at room temperature are very likely to be decomposed by the bacteria to produce toxic histamine, and if you eat too much of it, it may lead to histamine poisoning, with symptoms such as redness, dizziness, headache, rapid heartbeat, fast pulse, chest tightness and shortness of breath, and drop in blood pressure, etc. Individuals may also experience asthma. , and individual patients may also experience asthma symptoms.
2. Gastrointestinal reactions
Dead crabs may also produce a substance called histamine-like, eating this substance is likely to cause vomiting, abdominal pain, diarrhea and other gastrointestinal adverse reactions.
3How to save crabs from dying
The bathtub or fish tank temporary method: about 7 days
Home has a bathtub or fish tank friends, you can use its temporary hairy crabs, to ensure that it is fresh and alive, the method is as follows:
1, pick out vigorous hairy crabs, generally touch its eyes, blinking agile is vigorous.
2, the hairy crabs into the bathtub or aquarium, and then add the crab body half the amount of water, the water can not be more, otherwise there is no oxygenation equipment, the hairy crabs will be due to a lack of oxygen and accelerate the death.
3, and then put the right amount of small fish and shrimp feeding, the temperature is not high when the hairy crabs can be saved for more than 7 days without dying.
Plastic bucket preservation method: about 3-5 days
1, the same is to pick the vitality of the preservation of good, not much vitality to eat as soon as possible.
2, the hairy crabs in turn into a plastic bucket, bucket height of 50 centimeters is appropriate, to avoid climbing out.
3, and then add a little water in the bucket, just buried hairy crabs, so that the hairy crabs eight feet can stand up in the water to breathe.
4, every day regularly check the hairy crabs, found that the lack of vitality on the take out and eat, the general vitality of the good can live 3-5 days without dying.
Refrigerator chilling method: about 3-5 days
1, the hairy crabs with palm leaf rope or cotton rope tied its crab pincers and legs, to reduce its activity consumption.
2. Place the tied crabs in the freezer section of the refrigerator and cover with a damp towel.
3. If the portion is large, arrange the crabs one by one on a plate and then cover with a wet towel, which can keep the water content of the crabs.
4, the temperature is maintained between 5-10 degrees, this method of preservation of hairy crabs can be kept fresh for 3-5 days without dying.
However, due to the low carbohydrate content in hairy crabs, almost all consumed in the storage process is protein, if kept for a long time, the protein in the body of hairy crabs will be a large number of losses, the appearance of meat is not full, it is recommended to consume as early as possible is appropriate.