Newborn and baby seals are commonly referred to as pups until they are 5 years old. After the five-year mark, young seals are called yearlings.
A female seal is usually pregnant with their young for 11 months to a year. Following this period, the mother gives birth to the pup on land during the spring or summer, when there are warmer temperatures and an abundance of food. Seal pups can usually swim within just a few hours of being born. Some seals, such as the harp seal, live for about 20 years, whereas other species of seal, including the leopard seal, have been known to live until they are 26 or longer.