1, undercooked
If the color of crab yellow is black in the middle and orange around it, it is generally because the crab is not ripe.
At this time, continue to put it back into the pot and steam 1 for 2 minutes, so that the crab roe becomes attractive orange.
2. The crab's stomach is swollen.
The crab's stomach is located at the top of the hairy crab's dorsal shell. It is a triangular capsule, which contains a lot of sediment and dirt and is an inedible part.
If hairy crabs eat a lot before they die, their stomachs will swell. After steaming, it looks like there will be a big black substance. In fact, as long as the crab's stomach is removed, it can be eaten normally.
3. The mother crab is going to be born
Crab yolk is actually the ovary and digestive gland of the female crab. Crab fertilized eggs develop in the female crab for a period of time, and when they are about to be excreted, the whole crab yellow will change color, usually black or gray, mostly composed of melanin, anthocyanins and other components, and can be eaten.
4. Shell membrane
The growth and development of hairy crabs are accompanied by molting again and again, and the initial molting time is the inner membrane state of soft shell.
So there may be a black film in the crab shell, covering the crab yellow and looking black. In this case, you can eat it directly, which is harmless.
5. Dead crabs
If you eat hairy crabs, you must eat live crabs. If crabs are cooked after death, they can't be eaten.
After the death of hairy crabs, toxins and parasites in the body will spread rapidly. If you steam this crab again, it will be yellow and black and unfit for eating.
6. Environmental pollution
Hairy crabs are sensitive to the water environment, and the water quality of the culture environment will be reflected in crab roe. If there is more silt in the growing environment, the crab itself is seriously polluted and the color of crab yellow turns yellow, this crab is not suitable for eating.
It depends on whether the crab yellow bitter can be eaten, not all of them can not be eaten, mainly depending on what causes the crab yellow bitter.
The crab is not mature yet.
Bitter crab roe is different from our common golden crab roe. Crab yellow is lighter and thinner in color and does not agglomerate. This is because the crab is still too tender, and the time has not yet arrived. At this time, the crab meat is not thick.
Suggestion: Keep hairy crabs for a while before eating.
Crabs are not ready to cook.
Inadequate cooking preparation of crabs can also lead to bitter crab roe. Hairy crabs should be fully prepared before cooking. Except Yangcheng Lake hairy crabs, crabs must be kept in clean water for two days before they are bought and cooked. After two days, the crab was basically "clean". A clean crab's belly is full of dirty things, so crab roe naturally won't suffer.
The crab is sick.
Sick crab, crab yellow is bitter, and cream is not strong. Such crabs are easy to die, some are big, but their weight is not enough. There are some taupe spots or patterns on the shell of sick hairy crabs, which is commonly known as "coccidiosis"-a common disease of crabs. Pay attention to identification when buying.
Introduction of crab roe
The ovaries and digestive glands in crabs are orange and delicious. Crab yolk is not a crab egg. Although its composition is basically the same as crab roe, there are essential differences between them. Crab yolk does contain eggs that have not been excreted, but there are other crab organs, glands, tissue fluids and other substances, not just crab eggs. When the crab roe becomes large and bright orange, it shows that the gonad of the female crab has matured. At this time, crab eggs are produced and excreted, and the egg cells left in the gonads in the body still belong to crab yellow.
Crab yellow is rich in nutrients such as protein and phospholipids, but it also contains high content of oil and cholesterol. Crab yolk can be made into many delicacies: crab yolk porridge and so on. There is also a famous delicious snack on the beach-crab powder cage. As the name implies, the main ingredient is crab roe. There are two kinds of crab yellow: river crab yellow and sea crab yellow.
How to eat crab roe
Fried crab roe
1. prepared materials. Wash, peel and chop carrots.
2. After the salted egg yolk is steamed in the pot, press the mud.
3. Wash, peel and chop carrots and put them into a blender to make velvet.
The oil in the pot is hot, and the salted egg yolk is fried into sand.
5. Add chopped carrots and stir fry.
6. Add refined salt.
7. Sprinkle chicken essence and sugar, stir fry evenly, and carve patterns with a mold.
Crab paste may also be fat. Because in order to prepare for the winter, male crabs gradually accumulate fat and grow into crab paste (commonly known as crab oil). Peeling off the shell of the male crab, you can see that there is a white sticky thing in the crab shell and crab tuo, which is crab paste (crab oil). After cooking, crab paste becomes translucent. The more crab paste, the stronger the male crab.