Seamless looping vintage film footage of algae covering rocky riverbeds in the United States. The natural scene captures flowing water over mossy stones, with a bright blue hue and gentle movement. This archival quality stock clip features a serene, organic environment with a tranquil, meditative quality. Ideal for nature documentaries, environmental content, or ambient background visuals. The 8mm-style film gives it a nostalgic, analog aesthetic with subtle grain and soft focus. Perfect for illustrating ecological growth, freshwater ecosystems, or peaceful outdoor settings.