Soft-shell crab is a kind of crab that grows in the sea. Soft-shell crab is a short-lived form shortly after the crab sheds its shell; every time it metamorphoses and grows up, it is like the beginning of a new life. While shedding its shell, it also retains its original shape. The gills, food pouch, and internal organs are removed, so there is no trace of dirt on the whole body.

Extended information

Nutritional value

1. The soft-shell crab meat is tender, rich in flavor, and can be eaten all over the body;

2. Nutritional components of crab shells: Crab roe, cypripin, chitin, chitosan, calcium carbonate, and protein.

Soft shell crab is rich in nutrients and can be eaten all over the body. It contains 18 kinds of amino acids. In addition to water, every 100g of soft shell crabs contains 14.0g of protein, 2.5g of fat, 0.8g of carbohydrates, and 14.0g of zinc. ．2mg, calcium 39.7mg, phosphorus 2mg, iron 37mg, vitamin A230 international units, riboflavin 0.0051g, etc.

Muscle contains more than 10 kinds of free amino acids, of which glutamic acid, proline and arginine are relatively high. In particular, its soft shell is rich in free calcium, which can promote children's growth and development and is an excellent product for children to increase their intelligence.

Body characteristics

Although crabs are small, they have all five internal organs. After removing the hard shell of the crab, we can find that

Chinese sand crab

The body part of the crab is protected by a layer of shell. These shield-like shells, biologists say For the carapace.

The body of the crab is symmetrical and can be divided into the forehead area, eye area, heart area, liver area, stomach area, intestine area and gill area. The two sides of the crab's body are connected by appendages. The appendages on the head are called antennae, which provide touch and smell functions. Some appendages have mouth functions, which are used to tear food apart and bring it into the mouth.

The crab's chest has five pairs of appendages called thorax. The pair of appendages in the front are equipped with strong claws, which can be used for foraging. The remaining four pairs of appendages are the crab's feet. Crabs rely on these four pairs of appendages to walk and move. Their walking appearance is unique and unique. Interesting, most of them are walking sideways instead of going straight forward.

The exception is monk crabs, which walk straight. Based on the characteristic that the two legs at the tail end of the crab are less involved in walking, a 6-legged lateral moving walking mechanism was developed by imitating the walking method of the crab, and its motion characteristics were studied to meet the requirements of soft ground on rigid ground and agricultural production. Ground travel requirements.

Reference: Baidu Encyclopedia-Soft Shell Crab