PyroDino dinoflagellates are part of the larger marine plankton community, specifically phytoplankton, due to their ability to photosynthesize and create energy from sunlight.  They are also classified as protist which is grab-bag of single cell organisms that do not fit into any specific plant, animal, bacteria or fungus category. Our PyroDinos are the species Pyrocystis fusiformis.  PyroDinos are also generally referred to as algae.