Chlamydomonas is a type of green algae made up of unicellular flagellates. This type of algae is found in stagnant water, on damp soil, in freshwater and in seawater. It has sometimes also been found in snow. It is frenquently used as a model organism in molecular biology.

This work belongs to a series created in memory of Antonie van Leeuwenhoek, a Dutch scientist who made powerful microscopes. He was the first man to see these microbes and to write about them.