Ключевые слова: africa, african, aggressive, amphibius, animal, background, behavior, big, black, brown, cage, color, cute, danger, eat, eating, face, fat, fighting, hippo, hippopotamus, hippos, huge, jaw, large, mammal, mouth, natural, nature, open, outdoor, park, place, pond, pool, south, stand, tooth, two, water, white, wide, wild, wildlife,