鳍脚，英文名pterygopodium，属鳍脚目、鳍足亚目下一属，软骨鱼类包括两大类群，即板鳃鱼类和全头鱼类。前者指所有鲨鱼和鳐鱼，后者指银鲛类，其种类有限，生活在中国的仅黑线银鲛一种。
生物学家们长期认为，两类鳍脚亚目动物，即海狮和海象，都是从一种陆地上的类似于熊的动物繁衍而来的。
Biologists have long maintained that two groups of pinnipeds, sea lions and walruses, are descended from response to similar environmental pressures.
鳍脚类动物能以目标的尾流分辨其形状。
Pinnipeds are able to distinguish an object's shape by its wake.
有鳍状肢的属于鳍脚亚目动物的，肉食水生动物的一个分支，包括。
Of or belonging to the Pinnipedia, a suborder of carnivorous aquatic mammals that includes the seals, walruses, and similar animals having finlike flippers as organs of locomotion.
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