Ключевые слова: africa, african, aggression, aggressive, angry, angry hippo, animal, big, black, bw, closeup, conservation, danger, dangerous, fat, greyscale, head, hippo, hippopotamus, huge, hungry, jaw, lake, large, mammal, monochrome, mouth, natural, nature, open, open mouth, park, pond, reserve, river, roar, safari, south, strong, submerged, swim, teeth, tooth, water, wet, white, wide, wild, wildlife, yawn,