倭河马，又称侏儒河马，分布于西非热带雨林中，看起来似小型的河马，腿相对较长，嘴较小，体长约1.55米，体重仅160-200公斤重，还没有一些羚羊大。本种可以说是河马的近亲，但是无论从结构还是习性，都与河马相差较大：

The pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis) is a small hippopotamid which is native to the forests and swamps of West Africa, primarily in Liberia with small populations in Sierra Leone, Guinea, and Ivory Coast.

The pygmy hippo is reclusive and nocturnal. It is one of only two extant species in the family Hippopotamidae, the other being its much larger cousin the common hippopotamus (Hippopotamus amphibius). The pygmy hippopotamus displays many terrestrial adaptations, but like its larger cousin, it is semi-aquatic and relies on water to keep its skin moist and its body temperature cool. Behaviors such as mating and giving birth may occur in water or on land. The pygmy hippo is herbivorous, feeding on ferns, broad-leaved plants, grasses, and fruits it finds in the forests.