The pronunciation of crab: [xiè]

Crab (scientific name: crab) is a crustacean of the order Decapoda and the suborder Brachytail, especially the species of the Brachytail family (true crabs). It also includes other types, such as the Waiwei tribe, which has about 4,700 species. Its distribution is found in all oceans, rivers and land. The tail of the crab is different from other decapods (such as shrimps, lobsters, crayfish), curled under the chest, and the carapace is usually broad.

The first pair of thoracic legs were specialized into chelipeds. Usually moves by walking or crawling. The common shore crab's sideways gait is familiar to humans and is characteristic of most crab species. The species of Portunidae and some other types swim with flat, paddle-like appendages that are dexterous and have powerful pincers.

Crab is the general name for all short-tailed and crooked-tailed tribes. There are about 4,700 species in the world and about 800 species in China. Common genera include male crabs, swimming crabs, stream crabs, fiddler crabs, and mitten crabs. Although the porcelain crabs, cicada crabs, pseudolithic crabs, hermit crabs, coconut crabs and other genera in the suborder Brachyurina are also called crabs, they are different from the real crabs in the suborder Brachyurina.

Short-tailed crustaceans of the order Decapoda, especially Brachyura species (true crabs), but also include other types, such as Anomura species (appearance) And habits may be similar to short-tailed ones). There are about 4,500 species found in all oceans, freshwaters and land.