The North American river otter is a playful and agile mammal found in various aquatic habitats across North America. They have a streamlined body, webbed feet, and a thick, water-repellent coat that helps them stay warm and dry while swimming. River otters are social animals, often seen in groups, and are known for their acrobatic behaviors, such as sliding down mud or snowbanks. These otters primarily feed on fish, crustaceans, and small mammals, using their keen sense of sight and hearing to hunt. They are excellent swimmers, capable of diving up to 60 feet and holding their breath for several minutes. The North American river otter plays a vital role in maintaining healthy aquatic ecosystems.