Pygmy hippopotamus unusual secretion as common hippos, that gives a pinkish tinge to their bodies, and is sometimes described as "blood sweat" though the secretion is neither sweat nor blood. This substance, hipposudoric acid, is believed to have antiseptic and sunscreening properties. The skin of hippos dries out quickly and cracks, which is why both species 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
Pygmy madtom Pygmy madtom The pygmy madtom ("Noturus stanauli") is a species of fish in the family Ictaluridae endemic to the United States, in only two known regions of Tennessee. Madtoms are the smallest members of the catfish family. Members of the genus "Noturus" can be distinguished by their small size, unusually long adipose fin, and rounded caudal fin. Most specimens have been collected over shallow, fine gravel shoals with moderate to swift flow, usually near the stream bank. The pygmy madtom has an extremely limited distribution, appearing only in samples taken from the Duck River, in Humphreys and Hickman Counties, Tennessee;