#plankton  the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water
  supertype:  living_thing__organism__being  a living (or once living) entity that has (or can develop) the ability to act or function independently
  part:  copepod_crustacean
  member of:  congeries
  member:  phytoplankton  photosynthetic or plant constituent of plankton; mainly unicellular algae
  member:  zooplankton  animal constituent of plankton; mainly small crustaceans and fish larvae

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