File:Diatoms.jpg

en: Beautiful marine diatoms as seen through a microscope. These tiny phytoplankton are encased within a silicate cell wall.

Image ID: corp2365, NOAA Corps Collection Photographer: Dr. Neil Sullivan, University of Southern Calif. Orignally uploaded to en.WP by Petaholmes

Source: Wikimedia Commons http://commons.wikimedia.org/wiki/Image:Diatoms_through_the_microscope.jpg