Ключевые слова: animal, animals, aquaculture, aquatic, benthos, bentic, bentic organism, biology, closeup, contractile, filtering water, flagella, freshwater, laboratory, life, light microscope, macro, magnification, micro, microbiology, microorganism, microscope, microscopic, nature, organism, plankton, planktonic, pond, quadrata, research, river, roseola, rotifer, rotifera, rotofer, science, scientific, underwater, water, wheel, wildlife, zoology, zooplankton,