Merismopedia glauca is a species of cyanobacteria characterized by small, spherical or slightly oval cells, typically 1 to 2 micrometers in diameter. These cells form flat, grid-like colonies in rectangular or square patterns, ranging from a few to several hundred cells. They exhibit a blue-green color due to phycocyanin and chlorophyll a, essential for photosynthesis. Found in freshwater environments and moist soils, Merismopedia glauca adapts to various conditions and reproduces asexually by binary fission. It plays a role in oxygen production, carbon fixation, and potentially nitrogen fixation, serving as an indicator of water quality and ecosystem health.