How many legs does a normal crab have?

Crabs are crustaceans, their bodies are protected by hard shells and breathe on their gills. In biological taxonomy, they are similar to shrimp, lobster and hermit crabs. Most species of crabs live in the sea or coastal areas, and some live in fresh water or land. There are many species. There are more than 600 species of crabs in China. Let's take a look at how many legs normal crabs have.

How many legs does a normal crab have?

A normal crab has eight walking legs and two chelate feet that do not have the function of walking. There are five pairs of appendages in the crab's chest, called chest feet. The pair of appendages in front are equipped with strong claws that can be used for foraging. The other four pairs of appendages are crab feet. Walking depends on these four pairs of appendages. The appearance of walking is unique and interesting, mostly walking horizontally rather than straight forward.

What kind of food do crabs eat?

Crabs eat all kinds of food, eating meat and vegetables, and like to eat animal foods such as fish, shrimp, snails, worms, earthworms, insects and their young, but also eat injured or newly molted crabs, and crabs feed on eggs when they are hungry. In the natural environment, most of the crabs are aquatic plants, so plant food is the main food. Crabs are very gluttonous, eat a lot, and have a strong ability to digest. They can eat a lot when they are rich in food, but they will not starve to death if they do not eat for several days or even a month without food. Crabs stop or reduce their feeding during the winter in caves, and have the habit of fighting for food. In order to compete for a good meal, crabs often kill each other.

Common species of crabs

1. River crabs: River crabs breed in sea water, grow in fresh water, and like to dig holes, often hiding on the banks of rivers and lakes, or hidden in gravel and water plants.

2. Stone crabs: stone crabs are freshwater and salty aquatic crabs, that is, stream crabs, formerly known as stone crabs, inhabit streams or under rocks in streams.

3. Green crab: the green crab carapace is oval, flat and hairless, the head and chest are well developed, the double chelates are strong, and the hind foot is shaped like a mackerel, so it is said according to the son.

4. Flower crab: the width of the head and chest nail is about 2 times the length, fusiform, rough particles on the surface, and the granules of the female are more significant than those of the male.

5. Red crab: the surface of the red crab is smooth, the head and chest nail is reddish brown, there is a yellow cross in front of the middle, the claw feet are red and cloth with yellow markings, and the front end of the two fingers is dark brown.

6. Xu crab: the rising crab looks strange, like shrimp and crab. Penghu produces the most, has a thin shell and a lot of meat, and tastes delicious.

7, bread crab: bread crab head and chest nail back is very long, the side is covered with soft hair, the shape of the chelate foot is asymmetrical, the knuckles on the right are stout, and the chelate foot is close to the forehead when it contracts.

8. Glittering glitter: the head and chest nail is naked and glabrous, with fine particles and transverse protuberance, the front edge has 6 teeth, the first to fifth teeth gradually increase, and the last tooth is the smallest, showing a thorn shape.

9. Three-point crab: three-point crab head and chest nail shuttle-shaped, head chest nail and chelate feet are green and yellow, the movable fingers of the stinging feet are marked in red, and the feet are roughly light blue.

10. Swimming crab: swimming crab is also called "three verrucous swimming crab" because its head and chest is in the shape of a shuttle, and there are three protuberances in the center of the shell.