Ulva Lactuca at a beach with white sand at the Galicia cost in the atlantic ocean

ulva lactuca green alga closeup ecosystem natural light spain vegetation biology water world world aquatic environment life marine saltwater algology black sea bluegreen ecological ecology enteromorpha europe flora eutrophication grass macrophytes oxidation oxygen in water oxygen synthesis photosynthesis sea ecology selfpurification of water underwater footage wildlife alga algae flora green nature plant seaweed dream abstract remember galicia food healthy sand beach dreamy