海豚一种海豚科海洋鲸类哺乳动物，如的宽吻海豚，与鲸近似但一般比鲸小且有喙状吻。
Any of various Marine cetacean mammals, such as the bottle - nosed dolphin, of the family Delphinidae, related to the whales but generally smaller and having a beaklike snout.
白鳍豚的进化环境与其他海豚或鲸类哺乳动物完全不同。
It developed in near total isolation from any other species of dolphin or whale.
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