Planktonic
Part of speech: adjective
Definition: Floating in the open sea rather than living on the seafloor.
Organism
Part of speech: noun
Definition: A discrete and complete living thing, such as animal, plant, fungus or microorganism.Any complex thing with properties normally associated with living things.
Example sentence: I believe that the Universe is like a single organism, and we are all little nerve endings feeding our experiences back into a whole.