Seals, otters and walrus

Seals, walruses, whales, otters, and others rely on the back end of their bodies with their tail to produce thrust. Sea otters and seals share many adaptations. Both are marine mammals that give birth to live young and produce milk. They have lungs to breathe and are able to hold their breath underwater for long periods of time. Seals do not have ear flaps, only ear holes; they have short front flippers and cannot rotate their hind flippers. Walruses have no ear flaps but can rotate the hind flippers to “walk” on land.