River Otter (3 species), Sea Otter, Giant Otter, Hairy Nosed Otter, Japanese Otter, European Otter, Spotted Necked Otter, Marine Otter, African Clawless Otter, Oriental Small Clawed Otter.

13 species

Sea otters are the only species in their genus, Enhydra. However, there are thirteen species of otter in the subfamily Lutrinae; these include the Marine otter, the North-American river otter, the Neotropical river otter, the Southern river otter, the Eurasian otter, the Hairy-nosed otter, the Asian small-clawed otter, the African clawless otter, the Congo clawless otter, the Giant otter, the Smooth-coated otter, the Spotted-necked otter, and (of course) the Sea otter.

hello other otter

I think mammals... but I am not 100% sure...

There are 13 species of otter: African Clawless Otter

Aonyx capensis

Asian Small-Clawed Otter

Aonyx cinereus

Congo Clawless Otter,

Aonyx congicus

Sea Otter,

Enhydra lutris

North American River Otter

Lontra canadensis

Marine Otter

Lontra felina

Neotropical Otter

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South American River Otter

Lontra provocax

Eurasian Otter

Lutra lutra

Spotted-Necked Otter

Lutra maculicollis

Hairy-Nosed Otter

Lutra sumatrana

Smooth-Coated Otter

Lutrogale perspicillata

Giant Otter

There were 14 species but the Maxwells otter is now presumed extinct-TH