seal - any of numerous marine mammals that come on shore to breed; chiefly of cold regions

family Phocidae, Phocidae - earless seals

common seal, harbor seal, Phoca vitulina - small spotted seal of coastal waters of the northern hemisphere

harp seal, Pagophilus groenlandicus - common arctic seal; the young are all white

elephant seal, sea elephant - either of two large northern Atlantic earless seals having snouts like trunks

bearded seal, Erignathus barbatus, squareflipper square flipper - medium-sized grayish to yellow seal with bristles each side of muzzle; of Arctic Ocean

bladdernose, Cystophora cristata, hooded seal - medium-sized blackish-gray seal with large inflatable sac on the head; of Arctic and northern Atlantic waters