The true seals or earless seals are one of the three main groups of mammals within the seal suborer, Pinnipedia. All true seals are members of the family Phocidae. They are sometimes called crawling seals to distinguish them from the fur seals and sea lions of family Otariidae. Seals live in the oceans of both hemispheres and are mostly confined to polar, sub-polar, and temperate climes, with the exception of the more tropical monk seals.