甲鱼,学名鳖,又称元鱼、鼋鱼、团鱼、脚鱼、水鱼、水鸡、王八等。它是生活在淡水水域中的一种爬行动物,属脊椎动物的爬行纲鳖科。其体扁平,呈椭圆形或近圆形。背腹有甲,背部表面散有颗粒状突起,骨板不发达,呈橄榄色或暗淤泥包。其甲骨板外没有角质盾片,而有革质皮肤。甲骨板周围有一圈软边,称之为“裙边”,其质柔软肥厚。腹面呈黄白色或肉白色。其吻长,鼻孔在吻尖端,眼小,颈长,头颈及四肢可完全缩入甲内。鳖是雌雄异体,雌体比较肥厚,尾短而不突出甲外;雄体则相反,体 Turtle, turtle scientific name, also known as Yuan Yu, mandarin fish, fish group, foot fish, water fish, water chicken, king eight and so on. It is a kind of reptile living in freshwater waters, is a vertebrate reptiles Ganglidae. Its body is flat, oval or nearly circular. A dorsal ventral scattered with granular protrusions on the back surface, plate undeveloped, was olive or dark silt. There is no cuticle outside of the plate, and leathery skin. A circle around the edge of the soft edge of the bone plate, known as the “skirt”, the quality of soft and fat. Ventral pale yellow or white meat. The kiss long, nostril in the kiss tip, small eyes, neck length, head and neck and limbs can be fully retracted into a. Turtle is dioecious, females more hypertrophy, short tail and not prominent A; male on the contrary, the body