Earless seal
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The true seals or earless seals are sometimes called crawling seals to distinguish them from the fur seals and sea lions of the family Otariidae. Seals live in the oceans of both hemispheres and are mostly confined to polar, subpolar, and temperate climates, with the exception of the more tropical monk seals.
Phocids are more specialized for aquatic life than otariids. They lack external ears and have sleek, streamlined bodies. Retractable nipples, internal testicles and an internal penis sheath provide further streamlining. A smooth layer of blubber lies underneath the skin. Phocids are able to divert blood flow to this layer to help control their temperatures.
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Baikal seal | Bearded seal | †Caribbean monk seal |
Elephant seal | Grey seal | Harbor seal |
Harp seal | Hawaiian Monk Seal | Hooded seal |
Leopard seal | Ribbon seal | Ringed seal |
Saimaa ringed seal | Spotted seal | Weddell seal |