Scenedesmus quadricauda, a species of green algae, forms coenobia composed of four elongated cylindrical cells, each characterized by four tapering projections (caudae). These cells are typically small, ranging from 5 to 10 micrometers wide and 10 to 20 micrometers long, with smooth cell walls providing structural support. Chloroplasts, which are cup-shaped and contain pyrenoids for photosynthesis, are situated near the cell periphery. The nucleus is centrally located within each cell. Reproduction occurs through asexual cell division within the coenobium, promoting colony growth. Scenedesmus quadricauda thrives in freshwater environments like ponds, lakes, and slow-moving streams, where it plays a crucial role in freshwater phytoplankton communities.