The term 'Seal Babies' is a colloquial name for the young of the species of seal, which are known as pups. Seals are semi-aquatic mammals that live in the ocean and have flippers instead of feet. Seal pups are born with a thick layer of blubber and fur to keep them warm in the cold ocean waters. They are typically born in large groups on beaches and spend their first few weeks of life nursing from their mothers.