actinia sp., sea anemone in black sea saltwater marine biotope aquarium, macro shot of invasive alien species on stone

actinia active adult alien anemone animal aqua aquaculture aquarium aquascape aquatic atlantic background biodiversity biotope black body clear closeup colorful concept design edulis environment estuary exotic fauna fish fishkeeping free funny instinct invasion invasive life lineatus live macro marine mytilaster mytilus native nature ocean reef salinity saltwater sea shot space species stone substrate tank tentacle underwater water widespread wild