Pygmy hippopotamus

Description:

The skin is greenish-black or brown, shading to a creamy gray on the lower body. Their skin is very similar to the common hippo's, with a thin epidermis over a dermis that is several centimeters thick. Pygmy hippos have the same unusual sweat as common hippos, that gives a pinkish tinge to their bodies. The skin of hippos dries out quickly and cracks, which is why both species of hippos spend so much time in water. The skeleton of C. liberiensis is more gracile than that of the common hippopotamus, meaning their bones are proportionally thinner. The common hippo's spine is parallel with the ground; the pygmy hippo's back slopes forward, a likely adaptation to pass more easily through dense forest vegetation. Proportionally, the pygmy hippo's legs and neck are longer and its head smaller. The orbits and nostrils of a pygmy hippo are much less pronounced, an adaptation from spending less time in deep water

Notes:

Photographed at Lagos Zoo. Listed as 'critically endangered' on Wikipedia.