STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Dinoflagellate plankton. Coloured scanning electron micrograph (SEM) of the calcareous (calcium-based) test (shell) of a dinoflagellate Calciodinellum sp.. Dinoflagellates are unicellular (single-celled) protozoans, many of which are found in marine plankton. Magnification: x800 when printed 10 centimetres wide.
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