Also known as a Harbour Seal, the Common seal is the smaller of the 2 species of seals found in the Outer Hebrides. They are often seen swimming and they are stout but streamlined in shape. They can reach around 1.8metres in length and 130kg in weight. The grey seal has a slimmer hind end than the common seal. These seals have a long face with large eyes. They are often seen basking on rocks, the shore or swimming in the sea.