Editing Nautilus (section)

===Range and habitat===
[[File:Comparison of Nautilus capture rates with trapping depth.png|thumb|upright=1.5|Number of captured ''N.&nbsp;pompilius'' at various depths around the Osprey Reef Seamount, [[Coral Sea]]. The data was collated from 271 trapping events spread across all months of the year. Nautiluses were most common at {{cvt|300|-|350|m|ft|-2}}. No specimens were recovered from a depth of less than {{cvt|150|m|ft|-2}} during 18 trapping efforts.<ref name="Dunstan et al. 2011" />]]
Nautiluses are found only in the [[Indo-Pacific]], from 30° N to 30° S latitude and 90° E to 175° E longitude. They inhabit the deep slopes of [[coral reef]]s.

Nautiluses usually inhabit depths of several hundred metres. It has long been believed that nautiluses rise at night to feed, mate, and lay [[Egg (biology)|eggs]], but it appears that, in at least some populations, the vertical movement patterns of these animals are far more complex.<ref name=vertical>{{Cite journal | last1 = Dunstan | first1 = A. J. | last2 = Ward | first2 = P. D. | last3 = Marshall | first3 = N. J. | editor1-last = Solan | editor1-first = Martin | title = Vertical distribution and migration patterns of ''Nautilus pompilius''| doi = 10.1371/journal.pone.0016311 | journal = [[PLOS ONE]] | volume = 6 | issue = 2 | pages = e16311 | year = 2011 | pmid =  21364981| pmc =3043052 | bibcode = 2011PLoSO...616311D | doi-access = free }}</ref> The greatest depth at which a nautilus has been sighted is {{cvt|703|m|ft}} (''N.&nbsp;pompilius'').<ref name=vertical /> Implosion depth for nautilus shells is thought to be around {{cvt|800|m|ft|-2}}.<ref name="Dunstan et al. 2011" /><ref name=vertical /> Only in [[New Caledonia]], the [[Loyalty Islands]], and [[Vanuatu]] can nautiluses be observed in very shallow water, at depths of as little as {{cvt|5|m|ft|round=5}}.<ref name=Ward1987 /><ref name=vertical /> This is due to the cooler surface waters found in these southern hemisphere habitats as compared to the many equatorial habitats of other nautilus populations – these usually being restricted to depths greater than {{cvt|100|m|ft|-2}}.<ref name=Ward1987 /><ref name=vertical /> Nautiluses generally avoid water temperatures above {{cvt|25|°C|round=5}}.<ref name=vertical />

While nautiloids were once common worldwide, their numbers declined and their distribution became restricted to their current habitats during the Pleistocene, largely due to the diversification of pinnipeds.<ref>{{Cite journal |last=Kiel |first=Steffen |last2=Goedert |first2=James L. |last3=Tsai |first3=Cheng-Hsiu |date=2022 |title=Seals, whales and the Cenozoic decline of nautiloid cephalopods |url=https://onlinelibrary.wiley.com/doi/10.1111/jbi.14488 |journal=Journal of Biogeography |language=en |volume=49 |issue=11 |pages=1903–1910 |doi=10.1111/jbi.14488 |issn=1365-2699}}</ref> 

[[File:Deepest record of Nautilus – 703 meters.png|thumb|left|A pair of ''N.&nbsp;pompilius'' feeding on [[two-spot red snapper]] (''Lutjanus bohar'') bait during daytime at {{cvt|703|m|ft}} depth. This observation constitutes the deepest record of any nautilus species.]]