Smithsonian's National Zoo & Conservation Biology Institute
Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the Mustelidae family, which also includes weasels, badgers, mink, and wolverines, among other animals. Wikipedia
Scientific name: Lutrinae
Domain: Eukaryota
Family: Mustelidae
Kingdom: Animalia
Order: Carnivora
Phylum: Chordata