Editing Squid (section)

===Feeding===
Squid are [[carnivore]]s, and, with their strong arms and suckers, can overwhelm relatively large animals efficiently. Prey is identified by sight or by touch, grabbed by the tentacles which can be shot out with great rapidity, brought back to within reach of the arms, and held by the hooks and suckers on their surface.<ref name=Messenger/> In some species, the squid's saliva contains [[toxin]]s which act to subdue the prey. These are injected into its bloodstream when the prey is bitten, along with vasodilators and chemicals to stimulate the heart, and quickly circulate to all parts of its body.<ref name=Ruppert/> The deep sea squid ''[[Taningia danae]]'' has been filmed releasing blinding flashes of light from large photophores on its arms to illuminate and disorientate potential prey.<ref>{{cite journal |author1=Kubodera, T. |author2=Koyama, Y. |author3=Mori, K. |year=2006 |title=Observations of wild hunting behaviour and bioluminescence of a large deep-sea, eight-armed squid, ''Taningia danae'' |journal=Proceedings of the Royal Society B: Biological Sciences |volume=274 |issue=1613 |pages=1029–1034 |doi=10.1098/rspb.2006.0236 |pmid=17301020 |pmc=2124471 |url=http://www.pubs.royalsoc.ac.uk/media/proceedings_b/papers/RSPB20060236.pdf |access-date=13 January 2019 |archive-url=https://web.archive.org/web/20070216024900/http://www.pubs.royalsoc.ac.uk/media/proceedings_b/papers/RSPB20060236.pdf |archive-date=16 February 2007 |df=dmy-all }}</ref>

[[File:Ventouse calmar.jpg|thumb|The whip-like tentacles of ''[[Mastigoteuthis]]'' are covered with tiny suckers to catch small organisms like [[flypaper]].]]

Although squid can catch large prey, the mouth is relatively small, and the food must be cut into pieces by the chitinous beak with its powerful muscles before being swallowed. The radula is located in the buccal cavity and has multiple rows of tiny teeth that draw the food backwards and grind it in pieces.<ref name=Ruppert/> The deep sea squid ''[[Mastigoteuthis]]'' has the whole length of its whip-like tentacles covered with tiny suckers; it probably catches small organisms in the same way that [[flypaper]] traps flies. The tentacles of some [[bathypelagic]] squids bear [[photophore]]s which may bring food within its reach by attracting prey.<ref name=Messenger>{{cite book |author1=Hanlon, Roger T. |author2=Messenger, John B. |title=Cephalopod Behaviour |url=https://books.google.com/books?id=Nxfv6xZZ6WYC&pg=PA47 |year=1998 |publisher=Cambridge University Press |isbn=978-0-521-64583-6 |pages=47–49}}</ref>

Squid are among the most intelligent invertebrates. For example, groups of [[Humboldt squid]] hunt cooperatively, spiralling up through the water at night and coordinating their vertical and horizontal movements while foraging.<ref>{{cite web|url=http://deepseanews.com/2012/06/coordinated-hunting-in-red-devils/ |title=Coordinated Hunting in Red Devils |publisher=Deep Sea News|author=Smith, Helena|date= 5 June 2012 |url-status=live |archive-url=https://web.archive.org/web/20120611054534/http://deepseanews.com/2012/06/coordinated-hunting-in-red-devils/|archive-date=11 June 2012|access-date=9 December 2018}}</ref>