Zooplankton are the heterotrophic (sometimes detritivorous) type of plankton. Plankton are organisms drifting in the water column of oceans, seas, and bodies of fresh water. The name of zooplankton's derived from the Greek zoon (ζῴον), meaning "animal", and , meaning "wanderer" or "drifter". Many zooplankton are too small to be seen individually with the naked eye. Ecology Zooplankton's a broad categorisation spanning a range of organism sizes that includes both small proto… (More on Zooplankton)