Ключевые слова: abstract, algae, aquatic, background, bacteria, beach, biology, blue, bluegreen, bright, chemical, closeup, color, covered, cyanobacteria, danger, dirty, ecology, environment, flow, flowing, flutters, grass, green, growth, lake, landscape, life, liquid, marine, natural, nature, photosynthesis, plant, polluted, pollution, pond, river, sea, seaweed, selective, summer, surface, texture, water, wave, weed, wet,