Scale bar indicates 50 Ám.
Sample from Lake Constance near Bodman. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
Image under Creative Commons License V 3.0 (CC BY-NC-SA). This image was taken by Wolfgang Bettighofer. Image copyright by Wolfgang Bettighofer (www.protisten.de); image used under license to MBL.
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