Ключевые слова: africa, aggressive, animal, aquatic, beast, behavior, big, brown, closeup, dangerous, environment, exhibit, fauna, green, habitat, herbivore, hippo, hippopotamus, hot, huge, jaw, large, leaf, mammal, mouth, nature, open, outdoors, pond, powerful, scenic, summer, teeth, tooth, tropical, water, wet, wetland, wild, wilderness, wildlife,