OCEANS: Smallest microbe found to have large biodiversity Jessica Estepa, E&E reporter Published: Thursday, April 24, 2014 The smallest microbe found in the sea is much more biologically diverse than previously known, according to a new study. Please subscribe to E&ENews PM to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.