What is a Volvox? A quick overview Volvox is a genus of green algae. Volvoxes are free-floating single-cellular algae but typically stay together as spherical colonies (or balls) of 500-50,000 cells. They can live in a variety of freshwater habitats, including ponds, pools, and ditches. Under a microscope, volvoxes look like green marbles slowly rotating, … Continue reading Volvox – The emerald green algae of the micro world