Enhydra, the site classifies most other classifications as direct children, including the Species Enhydra lutris (Linnaeus, 1758) or the Nutria marina, sea otter, under which most of the remaining classifications are grouped. Of these, the Integrated Taxonomic Information System lists direct children of this species as the subspecies Enhydra lutris kenyoni (Wilson 1990) known by its common name of the northern sea otter, the Enhydra lutris lutris (Linneaus, 1758) or common sea otter and the Enhydra lutris neries known as the southern sea otter. Among these classifications for sea otter listed with the system, the subspecies Enhydra lutris kenyoni (northern sea otter), the subspecies Enhydra lutris lutris (common sea otter) and the subspecies Enhydra lutris neries (southern sea otter) are also listed separately within the menu.
Only one classification of sea otter did not fall within the same Genus category as the others. This was the smooth-coated otter. This type of otter is classified as being of the Genus Lutrogale (Gray 1865) and the Species Lutrogale perspicillata (I. Geoffroy Saint-Hilaire, 1826). The direct children listed as subspecies to the smooth-coated otter include the Lutrogale perspicillata perspicillata and the Lutrogale perspicillata sindica, although neither of these subspecies is included in the automatic search returns for the common name of the sea otter.
In addition to providing the entire taxonomic classification for the sea otter and its related subspecies, the site provides a great deal of additional information. Geographic location is listed on some, but not all of the classifications listed, illustrating that some form of otter is present in northern and southern Asia, North America, Europe and portions of Central America. Lists of references regarding the various subspecies are provided with links to the experts if available and comments are made when appropriate, such as when a particular subspecies is endangered or threatened. .