Nautilidae iyali ne na cephalopods na ruwa, wanda aka fi sani da nautilus. An siffanta su da harsashi masu kama da karkace mai ɗakuna masu yawa, waɗanda dabbar ta mamaye ɗakin da ke waje. Nautiluses su ne kawai membobi masu rai na subclass Nautiloidea, kuma sun canza kadan a bayyanar tun lokacin Late Triassic, kusan shekaru miliyan 240 da suka wuce.
