海豚（学名：Delphinidae）是与鯨魚和鼠海豚密切相关的水生哺乳动物，广泛生活在大陆架附近的浅海里，偶见于淡水之中。海豚大约包括了20几个属中的60多个种，其中海豚科是鯨目中最大的一科，大约于1000万年前的中新世演化而成。各种海豚的长度从1.2米到9.5米，重量从40千克到10吨不等[參 1][參 2]，它们主要以鱼类和软体动物为食。海豚是智商最高的动物之一，有着看起来友善的形态和爱嬉闹性格的它們，在人类文化中一向十分受欢迎。
There are almost forty species of dolphin in 17 genera. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's dolphin), up to 9.5 m (30 ft) and 10 tonnes (9.8 long tons; 11 short tons) (the killer whale or orca). They are found worldwide, mostly in the shallower seas of the continental shelves and are carnivores, eating mostly fish and squid. Thefamily Delphinidae, the largest in the order Cetacea, evolved relatively recently, about ten million years ago during the Miocene.
No comments:
Post a Comment