Enhydriodon

Enhydriodon was a genus of otters that lived in what is now Ethiopia during the Miocene and Pliocene epoch. The otter is thought to be a relative of modern-day otters. Enhydriodon was described as the largest otters to have ever existed, though only fragments of the genus have been found such as the skull, femur, and dental remains. Multiple estimates put it at about 200 kilograms (440 lb), making it the largest mustelid described so far.

Enhydriodon Temporal range: Miocene–Pleistocene,
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Family:	Mustelidae
Tribe:	†Enhydriodontini
Genus:	†Enhydriodon Falconer, 1868
Type species
†Enhydriodon sivalensis Falconer, 1868
Other species
† E. africanus Stromer, 1931 † E. dikikae Geraads et al., 2011 † E. ekecaman Werdelin, 2003 † E. falconeri Pilgrim, 1931 † E. hendeyi Morales et al., 2005 † E. omoensis Grohé et al., 2022

Although most species of the Enhydriodon genus are presumed to be semi-aquatic given most of the fossil isotope values being similar to fossilized semi-aquatic animals like hippopotamuses, the largest species, Enhydriodon omoensis, was determined to be a terrestrial predator, capable of hunting prey that consumed a wide variety of terrestrial plants.