Seals are a very wide range of mammals, from the polar regions of the cold zone to the waters of the tropical region, there may be seals distributed. The climate of the polar regions can be said to be cold all the year round, so seals have evolved some body structures to protect themselves in the long process of evolution, such as fur. Newborn baby seals are hairy, their hair is fluffy, relatively dense, is used to keep warm, can be used to protect themselves against the cold. Hair plays an important role in their life activities. The fur of baby seals is usually darker.
As mentioned above, the baby seal has hair, and their hair can play a role in keeping out the cold and keeping warm. Some people think that pups grow up without hair, because from the picture, their bodies are relatively smooth and look hairless. In fact, baby seals are also hairy when they grow up, but their hair is not the same as when they were young, and it looks less obvious, which makes some people think that adult seals are hairless. The fur of adult seals is also very dense, not as fluffy as when they were young, but harder and shiny. These hairs lie back against the seal's body and are more supple, so they look more hairless.
After the pups grow up, their fur color will also change to some extent. As mentioned above, pups are generally darker in color. As they get older, their fur gets darker. There are exceptions, of course, and some seals have white fur when they are born.
