cladophora, bryopsis, ulva green algae oxygenate in laminar flow, low salinity black sea biotope, littoral zone snorkel

cladophora sericea enteromorpha albida ulva intestinalis aquatic bottom coast shallow ceramium underwater landscape environment flora grow thicket aquascape marine odesa rock coquina salt saltwater ocean seascape seaweed submerged summertime travel wildlife swim exploration space shell gravel sand turquoise vegetation air bubble wave macrophyte algosociety photosynthesis oxygen synthesis selfpurification eutrophication ecology ukraine perspective header