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Fur seal
Fur seals are any of nine species of pinnipeds in the Otariidae family. One species, the northern fur seal (''Callorhinus ursinus'') inhabits the North Pacific, while seven species in the ''Arctocephalus'' genus are found primarily in the Southern Hemisphere. They are much more closely related to sea lions than true seals, and share with them external ears (pinnae), relatively long and muscular foreflippers, and the ability to walk on all fours. They are marked by their dense underfur, which made them a long-time object of commercial hunting.
==Taxonomy==
Until recently, fur seals were all grouped under a single subfamily of Pinnipedia, called Arctocephalinae, to contrast them with Otariinae – the sea lions – based on the most prominent common feature, namely the coat of dense underfur intermixed with guard hairs. Recent genetic evidence, however, suggests ''Callorhinus'' is more closely related to some sea lion species, and the fur seal/sea lion subfamily distinction has been eliminated from many taxonomies. Nonetheless, all fur seals have certain features in common: the fur, generally smaller sizes, farther and longer foraging trips, smaller and more abundant prey items and greater sexual dimorphism. For these reasons, the distinction remains useful.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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