| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Lutra canadensis (Schreber, 1777) |
American river otter | Western Atlantic and Pacific Ocean | |
| Lutra felina (Molina, 1782) |
Marine otter | Southeast Pacific and Southwest Atlantic | 100 |
| Lutra lutra (Linnaeus, 1758) |
Eurasian river otter | Asia and Europe Inland Waters, Northeast Atlantic; Indo-West Pacific, and the Mediterranean | 980 |
| Lutra nippon Imaizumi & Yoshiyuki, 1989 |
Japanese river otter | Northwest Pacific | |
| Lutra sumatrana (Gray, 1865) |
Endemic to Southeast Asia |