Zooplankton are the heterotrophic (sometimes detritivorous) component of the plankton that drift in the water column of oceans, seas, and bodies of fresh water. The name is derived from the Greek terms, zoon (ζῴον) meaning "animal", and meaning "wanderer" or "drifter". Many zooplankton are too small to be individually seen with the unaided eye. Zooplankton is a broad categorisation spanning a range of organism sizes that includes both small protozoans and large metaz… (More on Zooplankton)