thuridilla hopei - sacoglossan sea slug, underwater shoot in the mediterranean sea

angle animal animals antenna aquaculture aquarium aquascape aquatic aquatica background banyuls behavior bigger biology blue close closeup color colorful creature cut diving europe exotic fauna gastropoda hopei image invertebrate isolated italy life living macro mariculture marine mediterranean mollusk nudibranch ocean one opisthobranchia orange organism outdoors part photography picture plakobranchoidea rare reef sacoglossan saltwater sea seascape seaslug selective slug small submarine tank tension themes thuridilla tropical tuscany under underwater underwaterphotography view water watercolor white wildlife