The crab I bought in the morning has two colors that are slightly purple when I cook it in the after

If the crab you bought in the morning has two colors that are slightly purple when you cook it in the afternoon, this may be a problematic situation.

Crabs turning purple are usually a sign of freshness or death. When a crab is dying or dead, the hidooxyacids in the crab's body break down to produce histamine, a toxic substance. As the time of death prolongs, the crab body accumulates more and more histamine, and the poisonous gas becomes more and more powerful, and even if the crab is cooked, this toxin is not easily destroyed.

Therefore, it is recommended that you do not consume these purple crabs. If you're not sure if the crabs are fresh or dead, contact the seller or seller, or seek professional advice.

If there are no other abnormalities in the internal organs, it can be eaten with confidence.

In addition, in the process of cooking, the crab shell is not immersed in the water, but through the state of water vapor fumigation, the color of the crab shell will be significantly darker than that of boiled crabs, which is a normal phenomenon. In addition, do not cook for too long to prevent the crab roe from spilling.

Is it bought alive, the color of the crab is yellow after it is generally cooked, and if it is frozen, it appears purple after cooking, and it is estimated that it is dead of illness or accidental death by injection of medicine, so it is best not to eat it. Hope it helps, thank you!

As long as it's not a dead crab, it's generally not a big problem.

The black lump is what the female crab's ovaries look like after they are overdeveloped, but the taste is not too good, so you can choose to eat it yourself or not.

Two possibilities.

1 is undercooked. 2 Female crabs have mated like this, and female crabs are like this in winter, they can be eaten, but they are unpalatable.

The purple crab is a special species of purple crab, which is a treasure of Tianjin aquatic products. Purple crabs are the size of copper money, and they gather in the mud nests by the river every winter, and they must be caught through the ice. Although the crab body is small, the crab roe is full and fat, and it is the color of pork liver when it is raw, and it turns orange red after cooking, and the taste is fresh.

Purple crab, every winter, gather in the mud hole of the river embankment, must break the ice to catch, the abdomen is white and mud-free, because its crab roe is unusually rich, through the thin crab cover, showing a layer of purple, so it is named purple crab. In the Ming and Qing dynasties, it was a tribute.

When a crab is dying or dead, the hitoxitic acid in the crab's body will break down to produce histamine. Histamine is DAO

A substance that has a toxic return. As the time of death increases, the crab body accumulates more and more histamine, and the poisonous gas becomes more and more powerful, and even if the crab is cooked, this toxin is not easy to destroy. At this time the crab is purple, and that is a dead crab.

Ingredients: 1000 grams of crab, 15 grams of rice wine, 30 grams of minced ginger, 20 grams of soy sauce, 15 grams of sesame oil, 50 grams of balsamic vinegar, and a little sugar monosodium glutamate.

Method 1Put the minced ginger in a small bowl, add the soy sauce, sugar, monosodium glutamate, rice wine, and sesame oil that have been boiled in advance, and stir together to make a sauce.

2.Take a small bowl and put in an appropriate amount of vinegar for later use.

3.Wash the crab with clean water (pay special attention to brush the gap between its shell and legs and claws, as well as the fluff on the big crow), put it in a large bowl in the steamer, turn on high heat, and steam for 15-20 minutes until the crab shell turns from blue to bright red and the crab meat is ripe, take it out.

4.Serve with sauce and vinegar.

It must be a river crab, a sea crab can be eaten when it dies, but a river crab turns purple when it dies, which is poisonous, so the river crab eats it alive.

1. Unripe.

If the color of the crab roe is black in the middle, but the whole area is orange, it is usually because the crab is not ripe. At this time, continue to put it back in the pot and steam it for another minute, so that the crab roe can turn into an attractive orange-red color.

2. The crab's stomach is swollen.

The crab stomach is located at the top of the back shell of the hairy crab, and it is a triangular cyst that contains a lot of sediment and dirt, which is an inedible part. If a hairy crab eats a lot before it is alive, its stomach will swell. After steaming, it looks like a large black mass.

In fact, as long as the crab stomach is removed, it can be eaten normally.

3. Female crabs to be born.

The crab roe is actually the ovaries and digestive glands of the female crab, and the fertilized eggs of the crab develop in the body of the female crab for a period of time, and the whole crab roe will change color when it is about to be discharged from the body, generally black or gray, mostly melanin, anthocyanins and other components, which can be eaten.

4. Intrashell film.

The growth and development of hairy crabs is accompanied by molting again and again, and the first molting is the state of the inner membrane of the soft shell. Therefore, there may be a black film in the crab shell, covering the crab roe to make the crab roe look black, in this case, you can eat it directly, which is harmless.

5. Dead crabs. To eat hairy crabs, be sure to eat live crabs. If the crab is dead and then cooked, it is not allowed to be eaten. After the hairy crab dies, the toxins and parasites in the body spread rapidly. When this kind of crab is steamed again, the crab roe will appear black and black, which is not suitable for consumption.

6. Environmental pollution.

Hairy crabs are sensitive to the water environment, and the water quality of the breeding environment will be reflected on the crab roe. If there is a lot of silt in the growing environment, the crab itself is seriously polluted, and the color of the crab roe turns yellow, and this kind of crab is not suitable for consumption.

Reasons why crabs turn black after steaming:

1. The heating time is not enough. With a live female crab, after heating for about 10 minutes, take out and cut it to see, the crab roe is black in the middle and yellow around the periphery, put it in the pot and continue to heat it for a minute or two, and it will be all golden brown when you take it out, so it should just be that the heating time is not enough.

2. The stomach of hairy crabs after they are full, that is, the black gelatinous solid in the crab roe.

After a full meal, the stomach swells and it looks like there is more black gelatin, but this is normal, and it can be eaten normally after removing the black gelatin.

It means that the crab is not fresh, so don't eat it. If it's a river crab, don't eat it. Although you are buying live crabs, live crabs are also different, you may buy "live crabs" that are about to die, and the toxins in the crab's body have begun to reflect.

Or artificial crab roe and crab meat, I've heard of it, but I've never encountered such a black-hearted JS.

Hope it helps.

It must be not fresh, the crab roe and crab meat are starting to deteriorate, the fresh crab meat is firm, I used to watch TV and said that there are many ways to deceive consumers by selling crabs, and I personally think that the crabs you buy are not just caught, they have been artificially raised, and chemicals may be used in this process.

1. This paste is hairy crab, and that is the foam that evaporates from the red paste. You can eat it, it doesn't matter, it's not completely good! Hairy crabs are not successful because the crab shell is relatively soft, and there is no meat in the legs after steaming, and it is all water!

The crab roe is not full, it is blue, and it has a slightly bitter taste! This one is okay and can be eaten.

2. If you really want to eat out of elegance, then it is recommended that you eat crabs, especially hairy crabs, Yangcheng Lake is naturally the best, and the most particular diners who eat crabs use eight pieces of crabs, waist round hammers, small square tables, tweezers, long-handled axes, spoons, long-handled forks, scrapers, and needles. I really admire the people of Suzhou and Shanghai people for eating hairy crabs, and after eating crabs, they can fight back a crab.

3. The nutritional value of crabs: crabs are rich in nutrition and contain a variety of vitamins, of which vitamin A is higher than that of other terrestrial and aquatic animals, and vitamin B2 is 5-6 times that of meat, 6-10 times higher than fish, and 2-3 times higher than eggs. In addition to being rich in calcium, crab shells also contain crab red and crab xanthin.

It's the foam that evaporates from the red paste... It's okay to eat.

It has a gelatinous feeling, so you can eat it.