freshwater algae watermilfoil myriophyllum by microscope. ciliates infusoria stentor polymorphic protozoa microorganisms

algae animalcules aquatic benthic benthos biology ciliate ciliates feather filterfeeding filters filtration flagella form freshwater herbs heterotrophic hornshaped infusoria lake leaf life macro many microorganism microorganisms microscope myriophyllum nature petal plant polymorphic pond protozoa protozoan research river science seaweed sedentary stentor stream trumpet underwater watermilfoil wildlife zooplankton