Ключевые слова: africa, african, amphibius, animal, big, body, brown, close, danger, dangerous, eat, eating, enjoy, enrichment, eye, fat, feeding, fresh, fun, grass, green, happy, head, herbivore, hippo, hippopotamus, huge, jaw, lake, large, look, mammal, mouth, natural, nature, one, open, outdoor, park, plant, portrait, relax, river, safari, skin, south, water, wild, wildlife, zoo,