How many legs does a crab have, eight or ten? I have compiled relevant information, I hope it will be helpful to everyone!
How many legs does a normal crab have?
Generally, it has two pincers and eight legs. There are also special ones, such as the king crab, which has two pincers and six legs. There is a saying in Xunzi's exhortation: A crab has six knees and two claws, and there is no one except a snake and an eel who has nothing to rely on. It refers to this kind of crab with 6 legs and 2 pincers.
Normal crabs have eight legs that can walk, and two chelicerae that do not have the function of walking. The crab's chest has five pairs of appendages called pectoralis. The front pair of appendages are equipped with strong pincers, which are used for foraging. The other four pairs of appendages are the crab's legs. The walking appearance of these four pairs of appendages is unique and interesting. Most of them walk sideways instead of straight.
Crabs can eat a lot of food, and they like to eat fish, shrimp, snails, insects and other animal foods. They also cannibalize injured or shelled congeners. Egg-bearing crabs will also eat their own eggs when they are hungry. In the natural environment, most crabs have easy access to aquatic plants, so their food is mainly plant-based food. Crabs are very gluttonous, with large amounts of food and strong digestion capabilities. They can eat a lot when looking for food, they will not die when they go without food for several days or even a month, and they will stop or reduce their food intake during the winter. In order to compete for food, they often kill each other. Where do crabs usually grow?
Kingdom Animalia, Phylum Arthropoda, Subphylum Crustacea, Class Mollusca, Subclass Euphyla, Decapoda, Gastroderma, Brachychopodia. It is a crustacean (crustacean). Its body is protected by a hard shell and it breathes through gills. In terms of biological taxonomy, it is the same animal as shrimp, lobster, and hermit crab.
Most types of crabs live in the sea or offshore areas, and some live in fresh water or land. They rely on female crabs to give birth to baby crabs, and each time the female crab lays a large number of eggs, the number can reach millions or more. Crabs rely on the geomagnetic field to determine direction.
The number of genetic materials in this type of organism is complex and highly diverse, often as many as 100 pairs. Common crabs include hairy crabs (river crabs, hairy crabs, blue crabs), swimming crabs, etc. my country is very rich in crab resources, among which the hairy crabs produced in Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, Yangcheng Lake hairy crabs and Crab House hairy crabs in the lower reaches of the Yangtze River are top-quality.