Editing Octopus (section)

==Distribution and habitat==
[[File:Octopus cyaneain Kona.jpg|thumb|''Octopus cyanea'' in Kona, Hawaii|alt=An octopus nearly hidden in a crack in some coral]]

Octopuses inhabit every ocean, with species adapted to many [[marine habitat|habitat]]s. As juveniles, common octopuses inhabit shallow [[tide pool]]s. The Hawaiian day octopus (''[[Octopus cyanea]]'') lives on coral reefs, while [[Argonaut (animal)|argonauts]] float in [[Pelagic zone|pelagic waters]]. ''[[Abdopus aculeatus]]'' is a near-shore species and can be found in [[seagrass]] beds. Some species can survive in deeper environments. The spoon-armed octopus (''[[Bathypolypus arcticus]]'') can live {{convert|1000|m|ft|abbr=on}} deep, and ''[[Vulcanoctopus hydrothermalis]]'' lives in depths of {{convert|2000|m|ft|abbr=on}} around [[hydrothermal vent]]s.<ref name=Mather/>{{rp|13–15}} Species such as ''[[Megaleledone setebos]]'' and ''[[Pareledone charcoti]]'', can survive in the waters of the Antarctic, which reach {{convert|−1.8|C|0}}.<ref name=Oellerman>{{cite journal|last1=Oellermann|first1=M|last2=Lieb|first2=B|last3=Pörtner|first3=H-O|last4=Semmens|first4=J. M.|last5=Mark|first5=F. C.|year=2015|title=Blue blood on ice: modulated blood oxygen transport facilitates cold compensation and eurythermy in an Antarctic octopod|journal=Frontiers in Zoology|volume=12|issue=6|page=6|doi=10.1186/s12983-015-0097-x|doi-access=free|pmid=25897316|pmc=4403823}}</ref> No species are known to live in fresh water.<ref>{{cite web |last=Norman |first=Mark |date=16 January 2013|title=Ask an expert: Are there any freshwater cephalopods?|publisher=ABC Science |access-date=26 April 2017 |url=http://www.abc.net.au/science/articles/2013/01/16/3670198.htm}}</ref>

The [[Cirrina|cirrate]] species are often free-swimming and live in deep-water habitats.<ref name="Corporation2004">{{cite book |author=Marshall Cavendish Corporation |title=Encyclopedia of the Aquatic World |url={{google books |plainurl=y |id=swGA8GtK4n8C|page=764}} |date=2004 |publisher=Marshall Cavendish |isbn=978-0-7614-7424-1 |page=764}}</ref> Although several species live at [[bathyal]] and [[abyssal]] depths, only a single indisputable record documents their presence in the [[hadal zone]]; a species of ''[[Grimpoteuthis]]'' (dumbo octopus) photographed at {{cvt|6957|m|ft}}.<ref>{{cite journal |last1=Jamieson |first1=A.J. |last2=Vecchione |first2=M. |title=First in situ observation of Cephalopoda at hadal depths (Octopoda: Opisthoteuthidae: Grimpoteuthis sp.) |journal=Marine Biology |year=2020 |volume=167 |issue=82 |doi=10.1007/s00227-020-03701-1 |doi-access=free |bibcode=2020MarBi.167...82J }}</ref>