| Allonautilus scrobiculatus (Lightfoot, 1786) Crusty nautilus | 
|   | 
| photo by 
	Ward, P.D. | 
| Family: | Nautilidae (chambered nautiluses) | |||
| Max. size: | 18 cm SHD (male/unsexed) | |||
| Environment: | benthic; marine | |||
| Distribution: | Western Central Pacific. | |||
| Diagnosis: | ||||
| Biology: | Mantle length: 18.0 cm (Ref. 843). | |||
| IUCN Red List Status: | Data deficient (DD); Date assessed: 30 April 2022 Ref. 123251) | |||
| Threat to humans: | ||||
| Country info: |  | |||