Coelastrum microporum, a green algae species, forms colonies (coenobia) composed of spherical or slightly flattened cells. Each cell is polygonal in shape, typically arranged in groups of 8, 16, or 32 cells within a single layer. These cells are relatively small, ranging from 10 to 30 micrometers in diameter, with smooth and firm cell walls providing structural integrity to the colony. Chloroplasts are present in each cell, usually parietal and containing pyrenoids for photosynthesis, while the nucleus is centrally located. Reproduction occurs through asexual cell division within the coenobium, facilitating colony growth. Coelastrum microporum thrives in freshwater habitats such as ponds, lakes, and slow-moving streams, where it contributes to the diversity and productivity of phytoplankton communities.