The crab has 8 legs.

Crabs have 8 legs, which are on each side of the body, and the crab's large pincers are not part of the crab's legs. Normal crabs have a pair of pincer-like feet to dig holes, defense and offense called chelicerae, while the remaining four pairs of feet are used for walking or paddling and are called steppers.

The chelipeds and steppers don't have the same function, so technically, a crab should have eight legs that can walk and two chelipeds that don't function as walkers.

Crab:

The crab (Latin name: Brachyura, English name: crab), also known as the crab, the arthropod phylum Mollusca. The number of genetic material of these organisms is complex and has a great deal of variability, often up to more than 100 pairs. Common crabs include hairy crabs (river crabs, hairy crabs, clear water crabs) and pike crabs.

Chinese crabs are very rich in resources, with the lower reaches of the Yangtze River, the Gucheng Lake hairy crabs, Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, Yangcheng Lake hairy crabs, Crab House hairy crabs, Xinghua hairy crabs, and Hongze Lake hairy crabs produced by the hairy crabs for the top quality.

The crabs are small, but they have all the essentials. After removing the crab's hard shell, we can find that the body part of the crab is protected by a layer of shells, these shield-like shells, which biologists call dorsal armor (carapace).

The crab's body is symmetrical on the left and right, and can be divided into the frontal region, eye region, heart region, liver region, stomach region, intestinal region, and gill region. The crab has appendages (appendages) attached to each side of the body. The appendages on the head are called antennae, which have tactile and olfactory functions, and some of the appendages have a mouth function, which is used to tear food and deliver it into the mouth.