Description: Coenobium of Coelastrum sp. (A coenobium is a colony, containing a fixed number of cells, with little or no specialization). Eutrophic lake phytoplankton. Northern Poland. Date: 11 February 2007. Source: Own work. Author: http://commons.wikimedia.org/wiki/User:Panek. Permission(Reusing this file): 2.5.
