Ключевые слова: africa, alert, animal, aquatic, basking, bathing, buoyant, calm, camouflage, conservation, daylight, ears, ecosystem, environment, eyes, gentle, giant, habitat, herbivore, hippopotamus, large, mammal, massive, nature, nostrils, observing, outdoors, pond, protected, reflection, rippling, river, serene, skin, species, submerged, sunlight, sunlit, survival, texture, tranquil, warm, water, watery, wet, wild, wildlife,