1, preservation and selection of hairy crabs
Can hairy crabs be eaten if they die in the refrigerator?
Whether hairy crabs can be eaten after being put in the refrigerator depends on the specific situation.
Dead crabs with fresh-keeping layers can't be eaten.
The temperature in the fresh-keeping layer of the refrigerator is relatively high, which can keep vegetables and fruits fresh, but it can't inhibit the activity of fungi well, and at the same time, it has no strong inhibitory effect on the enzyme activity in the hairy crabs themselves. Therefore, after the hairy crabs in the fresh-keeping layer die, there will still be a lot of fungi breeding, and some histamine substances will be released in the body, which is toxic and inedible.
Hairy crabs frozen to death in the frozen layer can be eaten.
The temperature of the frozen layer of the refrigerator is generally below 0, which has a strong inhibitory effect on the activities of fungi and enzymes. The hairy crabs stored in this layer will soon be frozen. Therefore, the hairy crabs are frozen to death, and they will not produce their own fungi or toxins, which is also the main method for long-distance transportation of hairy crabs. You can rest assured to eat.
How to tell whether hairy crabs are dead or not
1. Look at the color: the back of fresh crabs is bright red and the abdomen is bright white after cooking, while the back of dead crabs is dark red and the abdomen is gray and gray.
2. Smell: Live crabs taste fresh seafood after being cooked, while dead crabs have a particularly pungent smell after being cooked because of their rotten meat, which is different from the bad smell of food.
3. Pinch hardness: After the live crab is cooked, its shell is hard, and it will not sag when pressed by hand, while the dead crab is soft because it has begun to rot, so it will be pressed by hand.
How can hairy crabs be preserved without dying?
Live culture at room temperature
The vitality of hairy crabs is actually very strong. As long as you put the bought hairy crabs in clean water for a few minutes, then put them away in a spacious basin or box, and sprinkle some water into them regularly to ensure the humidity of their living environment. Generally, if the room temperature does not exceed 25 degrees, they can survive for 3~5 days. If you put some food on them, they will be able to feed for a longer time without losing weight.
How to choose fresh hairy crabs
1. Touch the crab's eyes: the crab is relatively alive. When you touch its eyes, the eyes will immediately retract into the orbit, and when you take your hand away, it will stretch out again.
2. Turn over: Those who are fresh crabs are very active. For example, turn over the hairy crabs with their stomachs up, and the fresh ones will soon turn over by themselves.
3. Look at bubbles: crabs have the habit of drawing bubbles. Put crabs in a dry place. If they can spit out a lot of bubbles, they are fresh.
2. Unedible parts of hairy crabs
1, crab cheeks
Crabs, like fish, live in water, but they need to breathe fresh air all the time. Crabs have a relatively developed respiratory system called crab gills, which enables crabs to breathe through tiny bubbles in water. This crab gills is the dirtiest place in the crab's body and the main parasitic place of parasites, so they can't be eaten. After opening the crab shell, two rows of gray soft tissues are crab gills, which need to be removed before eating.
2, crab stomach
Crab is an omnivorous animal, and its food source is very broad, except for small fish and shrimp, underwater plants, underwater decays and so on. Therefore, the crab's stomach is also very dirty. When the crab shell is opened, there is a triangular black thing in the crab yellow area, which is the crab stomach, which needs to be picked off when eating.
3, crab heart
Crab heart, commonly known as hexagonal plate, grows in the middle of crab yolk and is connected with crab stomach. It is not very clean and can't be eaten. It is also one of the main areas where parasites live, so it should be thrown away when used.
4. Crab intestines
Crab intestine is a tube connecting the stomach and navel of crab, which is generally not eaten. When the crab shell is removed, it will be directly pulled off, but it will be pulled off if it is suitable, resulting in part of the crab intestine in the crab yellow area, which needs to be removed when eating.
5. Crab shell
The shell of hairy crabs must not be eaten by everyone. This is hard. Although the mineral calcium and phosphorus are rich, people can't digest it in the gastrointestinal tract, and they can't bear the friction damage of this hard food, so they need to throw it away.