hatpin sea urchin - centrostephanus longispinus

sea species native western atlantic coastal waters established invasive european asian regions adriatic aegean animal aquatic animals life aquaworld blue close closeup creature greece invertebrate marine mediterranean medusa ocean saltwater scuba diving shape translucent tropical water undersea underwater unreal adria italy spain france malta cyprus croatia professional hatpin urchin centrostephanus longispinus family diadematidae subspecies rubricingulus antillarum colorful invertebrates diadematoida echinoderm echinodermata environment exotic hat pin long black spines long-spined photograph reef rock seabed sithonia snorkeling spine spined spiny diadematidae