Due to the striking similarities between Nautilus and its subspecies from their identical DNA sequence sections and synapomorphies, there is significant evidence to suggest that Nautilus pompilius exhibits phenotypic plasticity. Namely, Nautilus subspecies identification through taxonomic features is difficult between populations as many features that were thought to be unique may overlap across different Nautilus populations.
The striking similarities between Nautilus and its subspecies in their DNA sequences and shared characteristics suggest that *Nautilus pompilius* exhibits phenotypic plasticity.  This is further supported by the difficulty in identifying subspecies through traditional taxonomic features, as many traits previously thought to be unique may overlap across different populations.