1 How to judge how long a crab has been dead

It is difficult to judge the specific time of how long a crab has been dead, but generally you can refer to the following identification methods to determine the length of time a crab has been dead. Such as:

1. Pinch the shell: The softening of the crab shell means that the crab has been dead for a longer time.

2. Look at the weight: If the crab is very light, it means that the meat is empty and it will take a long time to die, especially frozen crabs.

3. Look at the legs: The crab legs are hanging down and are very loose and inelastic, which also means that they have been dead for a long time.

4. Smell: If you smell the fishy smell of crabs, it means that the crabs have become rotten and have been dead for a long time and cannot be eaten anymore. 2 How to judge whether a crab is dead 1. How to judge whether a crab is alive

(1) Look at the eyes: The eyes of live hairy crabs will move on their own when touched, while the eyes of dead crabs will not move on their own. .

(2) Pull the crab claws: Use your hands to stretch the legs of the hairy crab. If they shrink back when you pull them apart, it means the crab is alive.

(3) Put the crab into the water: Put the crab into half a basin of water. The crab that blows bubbles means it is still alive, otherwise it means it is dead. 2. How to judge cooked crabs

(1) Look at the color: For steamed crabs, check whether the back is dark red and whether the abdomen is off-white. If so, it is a dead crab. If the back is bright red, The abdomen is bright white, that is live crab steamed.

(2) Look at the taste and texture: after steaming, fresh crabs taste fresh and tender and the meat is soft; while after steaming dead crabs, the meat is soft or hard, with a loose texture and lack of umami.

(3) Smell: Although live crabs have a fishy smell after being cooked, they do not have the smell of food decay, while dead crabs have a more obvious rancid smell after being steamed. It can be distinguished if it is eaten steamed, but strong flavors such as braised in braise will cover up the smell. 3. Can crabs that have died within 24 hours be eaten?

It depends on the storage environment.

If a recently dead crab is stored at room temperature, the bacteria in the dead crab will multiply rapidly and spread into the crab meat. These bacteria will decompose the amino acids in the crab and produce a The toxic substance histamine can easily cause allergic food poisoning. In addition, it can also produce a substance called histamine-like substance, which can easily cause symptoms of vomiting, abdominal pain, and diarrhea. Even if the death time is short, Can't eat.

But if the crab dies in the freezer, the temperature in the refrigerator is relatively low, and the rate of bacterial growth and reproduction will be relatively slow, which can slow down the reproduction rate of bacteria in the crab. Generally, it will die within 24 hours. Crabs can be eaten, but dead crabs cannot be eaten within 24 hours of being refrigerated. They can usually be eaten after being refrigerated for about 6-8 hours. 4 Taboos on eating crabs

In addition to not eating dead crabs, you also need to pay attention to the following points when eating crabs: 1. Avoid eating half-cooked or raw crabs

Crabs often contain paragonimiasis If metacercariae and solitary bacteria parahaemolyticus are not sterilized or killed by high temperature, once inhaled into the human body, they will parasitize in the human lungs and cause lung damage. In addition, crab shells are relatively hard and difficult to ripen. In order to prevent them from being eaten into the lungs Flukes, after the water is boiled, the crabs must be steamed for more than 10 minutes to fully disinfect and sterilize. 2. Avoid eating the stomach, intestines and ribs of crabs

Crabs like to eat corrosive food. These parts often contain pathogenic bacteria or toxic debris. When eating crabs, do not chew them randomly. It is best to eat crabs. These parts could be removed before.

3. Avoid eating crabs without cleaning them

Crabs have all kinds of dirt and germs stuck on the outside of their shells. Before cooking, you should scrub the crabs with a brush and then soak them in light salt water for a period of time. Crabs will spit out all the dirt, so remember to change the water repeatedly. 4. People with allergies should not eat it

Many people are allergic to crabs because they contain specific proteins. Such people are also allergic to shrimps. If you have ever been allergic, you must avoid eating them, otherwise it will easily cause skin problems. It can cause wheals, nausea, vomiting, and in severe cases, coma, which is life-threatening.