Ключевые слова: abstract, alga, algae, animal, aquatic, background, bacteria, blue, brown, colonial, colonies, colony, color, cyanobacteria, cyanobacterium, detail, ecology, education, environment, filamentous, food, freshwater, grass, green, heterocysts, image, island, laboratory, lake, light, macro, marine, microbiology, microscope, microscopic, nature, nitrogen, ocean, pattern, plankton, plants, pond, science, sea, seaweed, slide, structure, texture, tropical, water,