Mesozooplankton
From Coastal Wiki
Mesozooplankton: Planktonic animals in the size range 0.2-20 mm. Examples: the copepod Calanus finmarchicus, Rhincalanus gigas.
Taken from the University of Southern maine web site (http://www.usm.maine.edu/gulfofmaine-census/Docs/Reference/organism_mesozooplankton.htm)