螃蟹是我国名产动物之一,它属于节肢动物门(Arthropoda) 甲壳纲(Crustacea) 十足目(Deca-poda)爬行亚目(Reptantia)短尾族(Brachyura)方蟹科(Grapsidae).因地区不同,俗称毛蟹、清水蟹等,一般统称河蟹,在动物学上称为中华绒蟹(EriocheirSinensisH, Milne-Eawards). 一、螃蟹的构造螃蟹头胸部宽阔,背部复盖背甲,群众叫“蟹斗”.腹面缩小,藏在头胸部的下方,并有胸板包着,柔软的内部器官由坚硬的甲壳保护.背甲的前缘有四个额刺, Crab is one of the most famous animals in China and belongs to the genus Arthropoda, Crustacea, Dept-poda, Brachyura, Reptantia, Different, commonly known as hairy crabs, crabs, etc., generally referred to as crabs, in zoology called Chinese crabs (EriocheirSinensisH, Milne-Eawards.) First, the structure of crabs Crab head chest wide, back covered carapace, the masses called Crab bucket. "Abdomen narrowed, hidden under the head and chest, and chest wrapped, soft internal organs protected by a hard carapace.The carapace has four frontal thorn,