A common seal, also known as harbor seal, is a marine mammal found along the coasts of the Northern Hemisphere. These seals are characterized by their spotted coats, which can vary in color from gray to brown. They typically inhabit coastal waters and are often seen resting on rocks or beaches. Common seals are known for their playful behavior and can often be spotted swimming in groups. They primarily feed on fish and invertebrates, using their sensitive whiskers to detect prey in the water. Their ability to dive deep allows them to hunt effectively in their natural habitat.