Lutra canadensis, commonly known as the North American river otter, is a semiaquatic mammal that belongs to the weasel family. Recognized by its brown fur and webbed paws, the North American river otter goes by several other names such as the common otter, river dog, and even the water wolf. These names reflect the adaptability and predatory nature of the otter, as it effortlessly navigates through water and hunts fish and other aquatic creatures. Other regional synonyms for Lutra canadensis include the American otter, Canadian otter, and Florida otter. Regardless of the name, the North American river otter remains an important and beloved species in the wildlife of North America.