To sum up, the whitening of crab shells is mainly due to parasites attached to them, but these parasites can be killed by treatment and high-temperature disinfection, which will not harm human health and can be eaten normally.
However, if the crab shell is not only white, but also smelly and sour, then most of the crabs have gone bad and can no longer be eaten, so as not to cause harm to human health.
What's white in crabs?
The white thing in the crab may be crab paste. The main component of crab paste is male crab sperm, and the secondary component is fat. If you open the crab and see a white sticky substance inside, it may be a male crab.
What's the white thing on the crab shell?
The white thing on the crab shell may be an infected parasite. Crabs grow in a complex environment and are easily infected with parasites. It is normal to see white things on crab shells. Therefore, eating crabs must be disinfected at high temperature. After the crab is cooked, the parasite dies and no longer poses a threat to people's health.
Can the yellow in the crab be eaten?
The yellow inside the crab is edible. This is crab yellow, which is unique to female crabs and contains ovaries and digestive organs of crabs. From the point of view of nutrition and health, eating crab roe also has a good health care effect.
How to preserve unfinished crabs?
Crabs will gradually enter a dormant state in the refrigerator, and the mortality rate is low. Therefore, crabs that are not eaten for the time being can be stored in the refrigerator first, which can prolong the shelf life of crabs and is a better way to preserve crabs.
How can live crabs not die easily?
1. Tie up the crabs and put them in the freezer, preferably on the fruit floor. Spread a wet towel on the crab. Don't wring them too dry. Do not fold towels. This will keep it for a while.
2. Keep crabs in water. If crabs are too thin or want to be stored, you can feed sesame seeds or broken eggs and add some yellow wine to fatten them up.
3. Keep it moist. Living for a week or two is not a problem. Just don't soak in the water. Breeding places are generally placed in cement pools, and water is sprayed every day, sometimes for one or two months.