Group of Chambered Nautilus, Nautilus belauensis, Micronesia, Palau

nautilus nautiliden nautilida nautilidae lophotrochozoen nautiloiden nautilina argonauta living fossils evolution shell shells pearl pinhole olfaction mollusc mollusca cephalopoda nautiloidea nautilus pompilius nautilus belauensis chambered nautilus three group closeup close up close up detail portrait cut out cutout still stills underwater marine wildlife marine fauna nature aquatic sea ocean underwaterphoto underwaterpicture underwaterphotography underwaterworld sealife carolines islands carolines pacific oceania oceanica group of chambered nautilus nautilus belauensis micronesia palau horizontal format