Why is hippo skin red?

Hippo skin appears red due to the secretion of a natural substance called "blood sweat," which is a mix of red and orange pigments. This secretion acts as a sunscreen, protecting their skin from harmful UV rays, and also contains antibacterial properties to help prevent infections. The unique color helps to camouflage them in their aquatic habitats. Despite its name, hippos do not actually sweat blood; the pigment is produced by specialized glands in their skin.