👉 Ostropella is a type of alga found in freshwater environments, typically living in gravel or mud-filled areas where sunlight is scarce and water conditions are not ideal for photosynthesis. The algae have an elongated shape with a central body that can be up to 10-25 centimeters long, and they contain chlorophyll, which is responsible for converting light energy into chemical energy. Ostropella is characterized by its symbiotic relationship with the alga Eubacterium