what color is a hippos sweat and why
BRY2K. 2 votes Vote for this answer. It seems that hippos secrete a natural sunscreen, often called 'blood sweat' for its reddish-brown color. The hippo version of sweat, which is red-orange, contains pigments that can block microbial growth and some ultraviolet light.
1 vote Vote for this answer. Hippos are one of the other animals (like humans) that will sunburn. Thus, when they sweat, the pigment in their sweat (which is red-orange) is an antibiotic sunscreen. http://www.sciencenews.org/articles/20040529/fob5.asp.