What are 2 groups of plankton?
Not exactly. This is where misuse of terminology can get in the way of accurate information. "Plankton" are a large group of water organisms that can be organized into four basic groups: Phytoplankton Zooplankton Bacterioplankton Mycoplankton Zooplankton eat other plankton. Plankton provide an important food source for larger organisms.