red algae polysiphonia sp. near the shore in the salty tiligul estuary

tiligul estuary ukraine ceramium polisiphonia black sea flora algae alga algosociety algology algal plant green seaweed grass photosynthesis oxygen water oxidation synthesis selfpurification ecology bluegreen singlecelled macrophytes algobiota thickets riparian vegetation eutrophication nature wildlife underwater shot footage undersea ecological aquatic wild marine world saltwater seaside environment polysiphonia