Ключевые слова: africa, amphibius, animal, aquatic, artiodactyl, australia, bull, cow, fauna, freshwater, gregarious, head, heavy, herbivore, herbivorous, herd, hippo, hippopotamus, huge, mammal, megafauna, mouth, native, nature, place, sahara, saharan, south, species, sub, submerge, subsaharan, surface, swim, tanzania, teeth, torso, vulnerable, walk, wallow, water, wild, wildlife, zoo,