尾巴,对动物来说,就像人类的手和脚一样不可或缺。动物的尾巴,从长短来看,有的粗,有的细,有的长,有的短;从形状来看,有圆形的,有方形的;从有毛无毛来看,有的光溜溜的,有的毛茸茸的……说起来,人类的祖先也曾经是有尾巴的呢!方形尾巴的海马虽然叫海马,可海马真不是马哦,而是生活在海里的一种鱼——脑袋像马,肚子鼓鼓的,尾巴弯弯的。 Tail, for animals, is as essential as human hands and feet. The animal's tail, from the point of view, some coarse, some fine, some long, some short; from the shape point of view, there are round, square; from the hairless hairless, some light Yo-yo, some hairy ... ... speaking, human ancestors also used to have a tail it! Although the hippocampus of the square tail, but the seahorse is not a horse, but a fish living in the sea - the head like Horse, bulging belly, tail bent.