sea grass zostera and other algae in stormy outbursts near the shore in a quiet cove, black sea

zostera shore coast nature sea water beach coastline cladophora enteromorpha ulva ceramium polisiphonia black flora algae alga algosociety algology algal plant europe green seaweed grass photosynthesis oxygen in oxidation synthesis selfpurification of ecology bluegreen singlecelled macrophytes algobiota thickets riparian vegetation