Schroederia setigera is a species of green algae characterized by its small, spindle-shaped or cylindrical cells that taper towards the ends. The smooth cell wall may feature delicate spines or setae. Each cell contains one or more parietal chloroplasts with pyrenoids, and a centrally located nucleus. The cell ends often have bristle-like extensions. Schroederia setigera exhibits slow, gliding movements, likely facilitated by mucilage secretion.