An order of carnivorous aquatic mammals which comprises the seals, sea lions, and walrus. They are distinguished by their flipper-like limbs.
- Order Pinnipedia: three families.
- Some authorities, however, consider the pinnipeds to be monophyletic and basal to all living carnivores (feliform and caniform), and place it in a separate order, the Pinnipedia.
- The seals (Pinnipedia) have three extant families: Odobenidae, Otariidae (fur seals), and Phocidae (including gray seal and harbor seal).
- Within Pinnipedia, the closer affinity of Otariidae to either Phocidae or Obodenidae has long been debated.
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