With regard to the sleepÂing and wakÂing of aniÂmals, all creaÂtures that are red-bloodÂed and proÂvidÂed with legs give senÂsiÂble proof that they go to sleep and that they wakÂen up from sleep; for, as a matÂter of fact, all aniÂmals that are furÂnished with eyeÂlids shut them up when they go to sleep.
FurÂtherÂmore, it would appear that not only do men dream, but horsÂes also, and dogs, and oxen; aye, and sheep, and goats, and all vivipÂaÂrous quadrupeds; and dogs show their dreamÂing by barkÂing in their sleep. With regard to oviparous aniÂmals we canÂnot be sure that they dream, but most undoubtÂedÂly they sleep.
And the same may be said of water aniÂmals, such as fishÂes, molÂluscs, crusÂtaceans, to wit crawÂfish and the like. These aniÂmals sleep withÂout doubt, although their sleep is of very short duraÂtion. The proof of their sleepÂing canÂnot be got from the conÂdiÂtion of their eyes-for none of these creaÂtures are furÂnished with eyelids—but can be obtained only from their motionÂless repose.
-ArisÂtoÂtle, The HisÂtoÂry of AniÂmals, Book IV, Part 10,350 B.C.E
2,369 years latÂer, Marine BiolÂoÂgist David Scheel, a proÂfesÂsor at AlasÂka PacifÂic UniÂverÂsiÂty, witÂnessed a starÂtling event, above, that allowed him to expand on Aristotle’s obserÂvaÂtions, at least as far as eight-armed cephaloÂpod mollusks—or octopi—are conÂcerned
ApparÂentÂly, they dream.
Scheel, whose speÂcialÂties include predaÂtor-prey ecolÂoÂgy and cephaloÂpod biolÂoÂgy, is affordÂed an above-averÂage amount of qualÂiÂty time with these alien aniÂmals, courÂtesy of HeiÂdi, an octoÂpus cyanea (or day octoÂpus) who inhabÂits a large tank of salt water in his livÂing room.
Scheel’s usuÂal beat is cold water species such as the giant PacifÂic octoÂpus. HeiÂdi, who earned her name by shyÂly stickÂing to the farÂthest recessÂes of her artiÂfiÂcial enviÂronÂment upon arrival, belongs to a warmer water species who are active durÂing the day. Very active. Once she realÂized that Scheel and his 16-year-old daughÂter, LauÂrel, were instruÂments of food delivÂery, she came out of her shell, so to speak.
The hours she keeps affords her plenÂty of stimÂuÂlatÂing playÂtime with LauÂrel, who’s thrilled to have an aniÂmal pal who’s less ambivaÂlent than her pet goldÂfish and outÂdoor rabÂbit.
MeanÂwhile, the co-housÂing arrangeÂment proÂvides ProÂfesÂsor Scheel with an intiÂmaÂcy that’s imposÂsiÂble to achieve in the lab.
He was not expectÂing the astonÂishÂing nocÂturÂnal behavÂior he recordÂed, above, for the hour-long PBS Nature docÂuÂmenÂtary OctoÂpus: MakÂing ConÂtact.
As HeiÂdi slept, she changed colÂors, rapidÂly cycling through patÂterns that corÂreÂspond to her huntÂing pracÂtices. Scheel walks viewÂers through:
So, here she’s asleep, she sees a crab, and her colÂor starts to change a litÂtle bit.
Then she turns all dark.
OctoÂpusÂes will do that when they leave the botÂtom.
This is a camÂouÂflage, like she’s just subÂdued a crab and now she’s going to sit there and eat it and she doesÂn’t want anyÂone to notice her.
It’s a very unusuÂal behavÂior to see the colÂor come and go on her manÂtel like that.
I mean, just to be able to see all the difÂferÂent colÂor patÂterns just flashÂing, one after anothÂer.
You don’t usuÂalÂly see that when an aniÂmal is sleepÂing.
This realÂly is fasÂciÂnatÂing.
But, yeah, if she’s dreamÂing, that’s the dream.
As dreams go, the narÂraÂtive Scheel supÂplies for HeiÂdi seems extremeÂly munÂdane. PerÂhaps someÂwhere out on a coral reef, anothÂer octoÂpus cyanea is dreamÂing she’s trapped inside a small glass room, feastÂing on easÂiÂly gotÂten crab and occaÂsionÂalÂly crawlÂing up a teenaged human’s arm.
Watch the full episode for free through OctoÂber 31 here.
via LaughÂing Squid/This is ColosÂsal
RelatÂed ConÂtent:
Every U.S. Vice PresÂiÂdent with an OctoÂpus on His Head: KickÂstart The VeepÂtoÂpus Book
EnviÂronÂment & NatÂurÂal Resources: Free Online CoursÂes
Ayun HalÂlÂiÂday is an author, illusÂtraÂtor, theÂater makÂer and Chief PriÂmaÂtolÂoÂgist of the East VilÂlage Inkyzine. Join her in NYC tonight, MonÂday, OctoÂber 7 when her monthÂly book-based variÂety show, NecroÂmancers of the PubÂlic DomaincelÂeÂbrates the art of Aubrey BeardÂsÂley. FolÂlow her @AyunHalliday.