Hippopotamus, hippopotamuses, Hippo, hippos, Common Hippopotamus, mammals, animals, Hippopotamus amphibius, Common Hippopotamus, African wildlife, mammal, animal, big, large, horizontal, Ngorongoro Conservation Area, Ngorongoro Crater, Tanzania, african, sun screen, sun block, mud, bath, bathe, muddy, dirty, wetland, pond, africa, photo, photos, photograph, photographs, image, images, picture, pictures, stock, of, agency