Desmodesmus opoliensis is a small green algae species typically found in freshwater environments such as ponds, lakes, and slow-moving streams. It exists as unicellular or colonial forms consisting of 2-8 cells, each cell measuring approximately 10-20 micrometers in diameter. The cells have thin, smooth cell walls and contain chloroplasts that often exhibit a star-like or ribbon-like shape, housing chlorophyll for photosynthesis. Reproduction primarily occurs through binary fission, with occasional sexual reproduction via conjugation. Desmodesmus opoliensis is non-motile and can adhere to substrates or float freely in the water. It thrives in various environmental conditions, including moderate levels of pollution, and plays a role in aquatic ecosystems by contributing to nutrient cycling and serving as a food source for aquatic organisms.