Hippopotamus

The hippopotamus is almost hairless with very thick skin. The skin secretes droplets of an oil-like substance that works as a moisturizer and sunblock. The substance is red in color and is sometimes mistaken for blood. Hippos can live alone or in groups, which are called schools. When in a school, only the dominant male of the group will reproduce. Hippos spend most of the day sleeping in or near the water, grazing during the night. A hippo can eat up to 800 pounds of grass each night. Due to their size and aggressive nature, the hippopotamus is the most dangerous animal in Africa.