Why do crabs become empty shells when they die?
Crab is a high protein food. They are relatively easy to deteriorate and rot, and their bodies contain more bacteria and other microorganisms. Once the crab dies, bacteria will begin to multiply in the body and decompose the crab meat, so the meat quality will gradually decrease after the crab dies. There will be a period of time before crabs die. In order to survive, it will continuously consume protein in the body, decompose protein into amino acids and water, and release energy at the same time, resulting in the slow loss of its meat. It is consumed; At the same time, crabs contain some water for a reason. When steaming at high temperature, the steaming time will be longer. When steaming, the tissue fluid of crab meat will flow out, resulting in its meat quality becoming smaller.
Can crabs eat empty shells?
You'd better not eat this kind, it's a stale crab. Empty shell crabs are dead during transportation, and merchants will choose some dead or frozen according to their experience. After freezing, the water in crabs turns into ice. After steaming in the pot, the ice cubes will turn into steam and the crabs will become empty shells. Pick crabs with white bellies and complete legs and feet. Pinch the crab shell with your hands. If it is soft, it means that there is little crab meat in it, which in turn means that the crab meat is full.
How to avoid buying empty shell crabs
1. There is neither crab yellow nor crab paste in the empty crab shell, but some yellowish dirty things. The belly of a crab is a white crab shell, and the tip of the crab belly is the weakest part, almost transparent. So if it's an empty shell crab, there will be an irregular "yellow zone" in this place, which can still be found after careful observation.
2. The shell crab is empty inside, so the weight will be lower, so you can have a look. If you are not sure, pick one up and pinch it. Pinch shell is relatively empty, and it feels like pinching table tennis. It can basically be judged as an empty shell crab.
3. The male swimming crab is dark green and the female swimming crab is purple-brown, which is the most basic color feature. Both male and female crabs, as long as they are yellow, are basically empty shells.
Why do some crabs have no meat when steamed?
1, crabs have been dead for too long. If the crab dies for too long, it will be slowly decomposed by its own self-hydrolyzing protease. This type of crab is not recommended.
2, water crab, that is to say, most of its water is essentially water, and the meat itself is very small. After high-temperature cooking, water loses, so there is no meat.
3. Hungry and thin, it may also be because I haven't eaten for too long, so the crab is hungry and thin, so the crab itself has no meat, even if it is steamed, there is no meat.