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 closeup close up close up detail portrait reef reefs coralreef coralreefs coral reef underwater marine wildlife marine fauna nature aquatic sea ocean underwaterphoto underwaterpicture underwaterphotography underwaterworld sealife carolines islands carolines pacific oceania oceanica chambered nautilus nautilus belauensis micronesia palau horizontal format