The North American river otter is a semiaquatic mammal native to freshwater habitats across North America, including rivers, lakes, and marshes. A member of the Mustelidae family—alongside weasels, ferrets, and minks—it is well-adapted to life in the water. With its streamlined body, webbed feet, and dense, insulating fur, the river otter is built for agile and efficient swimming.nnSpecifications:nnThe full skeleton is present and in good conditionnSkull Length 11.6 cm (4.6 in.)nSkull Width 7.5 cm (3 in.)nSkull Height 4.8 cm (1.9 in.)