Ключевые слова: algae, animal, aquaculture, aquarium, aquatic, background, biology, cell, chain, copepod, crustacean, fauna, fish, flagellum, flora, food, fresh, freshwater, green, invertebrates, laboratory, lake, life, macro, marine, micro, microcosm, microorganism, microscope, natural, nature, nucleus, ocean, organism, peat, phytoplankton, plankton, planktonic, pond, protozoa, protozoan, research, science, sea, university, water, wildlife, zoo, zoology, zooplankton,