Hippo skin can be impressively thick, measuring around 1.5 inches (about 4 centimeters) in most areas. However, in some places, it can be even thicker, reaching up to 2 inches (5 centimeters) in certain spots like the back. This thickness serves several purposes.
Firstly, the tough skin protects hippos from predators, which can include lions and crocodiles. The formidable thickness acts as a barrier against bites and scratches. Additionally, hippos spend a significant amount of time in water, and their skin is also important for retaining moisture. To combat sunburn, hippos secrete a natural red substance that acts as both a sunblock and an antibacterial agent. This adaptation showcases how hippos have evolved to thrive in their unique habitat.