Platycola has mounted its upside down on the hyponeuston, the aquatic area closely attached to the water surface. Obviously the water´s surface tension was more attractive than the petri dish or bunches of filamentous .
Sample from a little creek near Kiel. This image was taken using Zeiss Universal with Olympus C7070 CCD camera.
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Wolfgang Bettighofer, www.protisten.de.