of nautilus pompilius or chambered nautilus on the blue background. striped sea mollusk in contour style

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