underwater mediterranean purple sea urchin - sphaerechinus granularis

adriatic algae animal aqua aquaculture aquascape aquatic aquatica behavior biology blue closeup color colorful creature dive diving echinoderm echinoid echinoidea echinus ecology europe european fauna fivefold form granularis image img invertebrate invertebrates italy life living macro mare mariculture marine mediterranean morski natural nature nostrum ocean one organism part pattern photography poison protection purple red scuba sea sealife seawater shell sphaerechinus spikes spiky spin spines star swimming symmetry toxopneustidae travel undersea underwater urchin urchins water white wild wildlife