Cystoseira barbata underwater landscape, yellow bushes algae, calm still water

cystoseira barbata algae underwater calm still water closeup close up habitat colorful aquatic plant barbata flora algobiota algology marine ecology selfpurification of water photosynthesis grass water world macrophytes algae thickets saltwater wildlife green eutrophication nature alga oxidation sea ecology seaweed oxygen in water ulva algal flora bluegreen oxygen synthesis ceramium algosociety enteromorpha nobody no people vibrant yellow real time high angle top view top down