North American River Otter: Agile Swimmer with Brown Fur

A North American river otter running along the river bank. It has a slender body covered in dense brown fur, a white belly, and a long, muscular tail. Known for its agility in the water, it can stay submerged for up to eight minutes. As a carnivore, it primarily feeds on fish, amphibians, and crustaceans. This solitary creature only socializes with other otters during the breeding season and fiercely defends its territory. As a keystone species, it plays a vital role in maintaining the balance of the ecosystem.