1. 
   picoplankton
   picoplankton Tiny planktonic organisms ranging in size from 0.2 to 2.0 micrometers. Great fleas have little fleas upon their backs to bite `em, And little fleas have lesser fleas, and ad infinitum. And the great fleas themselves, in turn, have greater fleas to go on; While these again have great...
   Found op http://www.wordinfo.info/words/index/info/view_unit/1667/
   
   
2. 
   Picoplankton
   Picoplankton is the fraction of plankton composed by cells between 0.2 and 2 μm that can be either : Some species can also be mixotrophic. Picoplankton are responsible for the most primary productivity in oligotrophic gyres, and are distinguished from nanoplankton and microplankton. Because they a...
   Found op http://en.wikipedia.org/wiki/Picoplankton
   
   

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