Editing Squid (section)

===Reproduction===
[[File:Squid colors 2.jpg|thumb|left|The [[Caribbean reef squid]] (''Sepioteuthis sepioidea'') employs a complex array of colour changes during courtship and social interactions.]]

Courtship in squid takes place in the open water and involves the male selecting a female, the female responding, and the transfer by the male of spermatophores to the female. In many instances, the male may display to identify himself to the female and drive off any potential competitors.<ref>{{cite journal |author=Arnold, John M. |year=1965 |title=Observations on the Mating Behavior of the Squid ''Sepioteuthis sepioidea'' |journal=Bulletin of Marine Science |volume=15 |issue=1 |pages=216–222 |url=https://www.ingentaconnect.com/content/umrsmas/bullmar/1965/00000015/00000001/art00008 }}</ref> Elaborate changes in body patterning take place in some species in both agonistic and courtship behaviour. The [[Caribbean reef squid]] (''Sepioteuthis sepioidea''), for example, employs a complex array of colour changes during courtship and social interactions and has a range of about 16 body patterns in its repertoire.<ref>{{cite book |author1=Hanlon, Roger T. |author2=Messenger, John B. |title=Cephalopod Behaviour|url=https://books.google.com/books?id=Nxfv6xZZ6WYC&pg=PA42 |year=1998 |publisher=[[Cambridge University Press]] |isbn=978-0-521-64583-6 |page=42}}</ref>

The pair adopt a head-to-head position, and "jaw locking" may take place, in a similar manner to that adopted by some [[cichlid]] fish.<ref>{{cite journal |author1=Jackson, George D. |author2=Jackson, Christine H. |year=2004 |title=Mating and spermatophore placement in the onychoteuthid squid ''Moroteuthis ingens'' |journal=Journal of the Marine Biological Association of the United Kingdom |volume=84 |issue=4 |pages=783–784 |doi=10.1017/S0025315404009932 |bibcode=2004JMBUK..84..783J |s2cid=86725399 }}</ref> The heterodactylus of the male is used to transfer the spermatophore and deposit it in the female's mantle cavity in the position appropriate for the species; this may be adjacent to the gonopore or in a seminal receptacle.<ref name=Ruppert/>

[[File:Squid Eggs (6997601241).jpg|thumb|Squid eggs<!--in the Philippines-->]]

The sperm may be used immediately or may be stored. As the eggs pass down the oviduct, they are wrapped in a gelatinous coating, before continuing to the mantle cavity, where they are fertilised. In ''[[Loligo]]'', further coatings are added by the nidimental glands in the walls of the cavity and the eggs leave through a funnel formed by the arms. The female attaches them to the substrate in strings or groups, the coating layers swelling and hardening after contact with sea water. ''Loligo'' sometimes forms breeding aggregations which may create a "community pile" of egg strings. Some pelagic and deep sea squid do not attach their egg masses, which float freely.<ref name=Ruppert/>