Spirostomum free-living ciliate protist, expanded and contacted (retracts if disturbed)

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Photo credit: © Scenics & Science / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: cillia, contrast, dic, freshwater, garden, illumination, lighting, micrograph, microscopy, normaski, phase, pond, pondlife, protozoa, protozoan, protozoans