6. Bottlenose dolphin (Tursiops truncatus) is mammal, order Cetacea. It lives in seas worldwide, mostly in temperate and warm, but can be found also in Artic and Antarctic Ocean.

• 宽吻海豚是哺乳纲，鲸目海豚科的一种。它通常生活在世界上气候温热的海域，但是在南北冰洋也发现了它的踪迹。收藏指正