海獺是稀有動物,只產(chǎn)于北太平洋的寒冷海域,海獺的身上長有動物界中最緊密的毛發(fā)每平方寸有一百萬根.根據(jù)動物學家的研究,海獺是由棲息于河川中的水獺,在大約五百萬年前才移居海邊而進化成海獸.因此,海獺并不像生存在于海水中已有三千五百萬年的老前輩海狗─那樣善于潛水,同時也缺乏一層厚厚的皮下脂肪以抗寒.
The sea otter is a rare animal,only
produced in the North Pacific cold sea otters,who has long hair most closely in
the animal world per square inch,one million.According to the study by
zoologist,sea otter otter inhabits rivers,about five million years ago and
evolved into the sea before moving the sea.Therefore,sea otters and not
survive in seawater has been thirty-five million years old seal that good at
diving,but also the lack of a thick layer of subcutaneous fat to cold.