of nautilus pompilius or chambered nautilus on white background. sea mollusk in contour style

art artwork black book cephalopod chambered coloring contour creature decor decorative deep demersal design detailed drawing element feeler fossil graphic illustration image invertebrate isolated linear lines marine mollusk nautical nautilus ocean ornate outgrowth outline pompilius sea seashell shell silhouette single spiral striped swirl tentacle undersea underwater vector white