Ключевые слова: alga, algae, animal, aquatic, background, beauty, blue, bottom, clean, clear, day, diving, ecology, ecosystem, environment, europe, fish, flora, flow, flowing, grass, green, habitat, lakes, landscape, leaf, life, light, natural, nature, ocean, plant, pond, river, season, seaweed, stream, summer, sun, sunlight, sunshine, surface, undersea, underwater, view, water, water surface, waving, weed, world,