Northern elephant seal

The northern elephant seal (Mirounga angustirostris) or northern sea elephant, is one of two species of elephant seal (the other is the southern elephant seal). It is a member of the familyPhocidae (true seals). Elephant seals derive their name from their great size and from the male's large proboscis. Sexual dimorphism in size is great. Correspondingly, the mating system is highly polygynous; a successful male is able to impregnate up to 50 females in one season.