nautilus detail macro

animal aquatic black blue bony cephalopod chamber chambered chambers closeup closeups coil coiled coiling curve curves delicate design designs detail details elegant fossil fossils green iridescence iridescent life macro macros marine marking markings mauve mollusca natural nature nautilida nautilidae nautilina nautilus nautiluses object objects ocean orange pattern patterns pearl pearlescence pearlescent phragmocone pink pompilius sea seashell seashells shell shells shiny spiral spirals swirl swirls white