鲸鱼的英文介绍

Any of various aquatic,chiefly marine mammals of the order Cetacea,including the whales,dolphins,and porpoises,characterized by a nearly hairless body,anterior limbs modified into broad flippers,vestigial posterior limbs,and a flat,notched tail。鲸目动物：鲸目动物中的一种水生动物,主要是海生哺乳动物,包括鲸、海豚和鼠海豚,特征为身体几乎无毛、前肢变成宽大的鳍、后肢退化及尾扁平而分叉