Moeritherium ('the beast from Lake Moeris') is a genus consisting of several species. These prehistoric mammals are related to the elephant and, more distantly, the sea cow. They lived during the Eocene epoch.
The Moeritherium species were pig-like animals that lived about 37-35 million years ago, and resembled modern tapirs or pygmy hippopotamuses (they are not believed to be related to either of those animals, however). They were smaller than modern elephants, standing only 70 centimetres (2.3 ft) high at the shoulder and were about 3 metres (9.8 ft) long. They are believed to have wallowed in swamps and rivers, filling the ecological niche now filled by the hippopotamus. The shape of their teeth suggest that they ate soft water vegetation.