Diatoms
Assorted diatoms, visualized here using light microscopy, live among annual sea ice in McMurdo Sound, Antarctica. Diatoms range in size from 2 to 200 µm.
Source
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"OpenStax College, Groups of Protists. October 16, 2013."
http://cnx.org/content/m44617/latest/Figure_23_03_09.jpg
OpenStax CNX
CC BY 3.0.
