nautilus fossil shell sliced open

abstract ammonite ammonites ammonoidea ancient animal approximately aquatic arranged background beautiful beauty biology black bright brown cephalopod cephalopoda chamber chambered chambers circle circular close closeup coleoid copyspace cut cutaway extinct fossil iridescent isolated ivory logarithmic molluscs mollusk natural nature nautiloid nautilus open orientation pattern room sea sealife shape shell shows sliced specie spiral split text vertical white