1, look at the weight: the crab meat that died not long ago will not lose too much, while the crab meat that died for a long time will decompose, so it will feel particularly light in your hand.
2. Knocking on the crab shell: Knocking on the crab shell that has just died has a dull feeling, while knocking on the crab shell that has been dead for a long time is empty.
3, smell: the crab itself has a fishy smell, but it will not produce a rancid smell just after death. If you die for a long time, it will smell rancid.
2 How do crabs distinguish between dormancy and death? 1. Touching the eyes Even in a dormant state, if you touch their eyes with your hands, they will shrink, while dead crabs usually stick their eyes out.
2. See if the live crab spits bubbles. If it is energetic, it will spit out white bubbles from time to time, while the dormant crab may not spit bubbles so often, which is a sign that the crab is still breathing, but if it dies, it will not spit bubbles.
3. untie the rope at room temperature to see the state. The crab may enter a dormant state in the refrigerator, but at room temperature, the crab will slowly regain its spirit. If you don't respond when you touch your eyes, you can untie the rope tied to the crab and put it on the table to see if it can crawl or extend its claws. If it doesn't have this feature, it means it is dead and must be discarded.
4, watering method with a small glass of water on the crab's mouth position, because crabs breathe with their gills, they will open their mouths when they encounter water, even if they are dormant, but if there is no response, they may be dead crabs.
3 How to tell 1 after a dead crab is steamed? Generally, the back of dead crabs is dark red and the abdomen is gray, while fresh crabs are bright red and the abdomen is bright white.
2. Taste After the dead crabs are cooked, most of them will have a bad smell or ammonia smell different from the fishy smell, while the live crabs are not cooked.
3, hardness After the live crab is cooked, the shell is very hard, and it will not sink when pressed by hand. Dead crab shells are soft and can be pressed by hand.
4. The live crab tastes fresh and tender after being cooked; Dead crab meat is loose, soft and rotten, inelastic and may have a bitter taste.
Can the blue crab be eaten after freezing for one night? number
Since it is impossible to specify the specific time of death, once the blue crab stored in the refrigerator dies, it will produce a large number of harmful microorganisms such as bacteria, and then decompose nutrients such as protein of the crab and produce toxins harmful to human body such as histamine. Moreover, this toxin can't be killed at high temperature, and it will cause food poisoning if eaten by mistake. Therefore, the blue crab can't be eaten after being frozen for one night.
Generally, after the crab dies, if it can't be frozen immediately, keep it at room temperature for a few hours, so don't eat it again; In addition, for those who cannot determine the specific time of death, it is best not to eat it for safety reasons.