Fur seals are a type of marine mammal found in the Southern Hemisphere. The term 'fur seal' can refer to three distinct species: the OTARY, ursal, and seacat. The OTARY is a species of eared seal found in the sub-Antarctic and Antarctic regions. The ursal is a species of earless seal found in the North Pacific Ocean. The seacat is a species of earless seal found in the Southern Ocean. All three species are characterized by their thick fur coats, which help them stay warm in cold ocean waters.