北海狮

北海獅（Eumetopias jubatus）主要分布在北太平洋沿岸，是北海獅属的唯一种类，海狮科最大的一种。

外形 

成熟的北海狮比其他种的海狮颜色浅，一般是淡黄到淡棕色，偶尔有些红色。雌北海狮比雄的稍浅一点。刚出生的北海狮几乎是纯黑色，几个月之后才退色。一般出生时体重为23公斤左右，不论雌雄，前五年迅速成长。五岁后，雌性约2.5米长，300公斤，成长速度减慢很多，但雄性可能到五到八岁性发育完全之后才停止成长，到那时长到3.33m左右，而且胸，颈和上身宽大，重量达到600-1100公斤。雄性额头较宽高，嘴部较平，颈部周围有一圈较黑较松的毛，看起来有一点像一圈鬃毛。 它们的拉丁文名字事实上可翻译成“有鬃毛的高额者”。

参考文件

延伸閱讀

Heptner, V. G.; Nasimovich, A. A; Bannikov, Andrei Grigorevich; Hoffmann, Robert S, Mammals of the Soviet Union, Volume II, part 3. Washington, D.C. : Smithsonian Institution Libraries and National Science Foundation

外部連結

Marine Mammal Center – Steller Sea Lion
US National Marine Fisheries Service Steller Sea Lion web page
ARKive – images and movies of the Steller sea lion (Eumetopias jubatus)
Alaska Department of Fish and Game page on Steller sea lions
Overview of Steller sea lion research at NOAA, National Marine Fisheries Service, National Marine Mammal Lab
Nature documentary about the decline of Steller's sea lions
News media report on Steller sea lions and sturgeon interactions
SeaLionPredation.com – news and information on seal and sea lion predation of salmon and steelhead in the Pacific Northwest
NOAA fact sheet on pinnipeds in the Columbia River
 Georg Steller's original description in De Bestiis Marinis, or, The Beasts of the Sea (1751)
 Watch more Steller sea lion (Eumetopias jubatus) video clips from the BBC archive on Wildlife Finder
 Fifteen years of research into the Alaska populations of Steller Sea Lions at the Alaska SeaLife Center

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