Editing Cephalopod (section)

==== Male–male competition{{anchor|Male-male_competition}} ====
Most cephalopods engage in aggressive sex: a protein in the male capsule sheath stimulates this behavior. They also engage in male–male aggression, where larger males tend to win the interactions.<ref name="ReferenceA"/> When a female is near, the males charge one another continuously and flail their arms. If neither male backs away, the arms extend to the back, exposing the mouth, followed by the biting of arm tips.<ref name=NormanEtAl1997>{{cite journal|last1=Norman |first1=M. D. |last2=Lu |first2=C. C. |title=Redescription of the southern dumpling squid ''Euprymna tasmanica'' and a revision of the genus ''Euprymna'' (Cephalopoda: Sepiolidae) |journal=Journal of the Marine Biological Association of the United Kingdom|date=1997 |volume=77|issue=4 |pages=1109–1137 |doi=10.1017/s0025315400038662 |bibcode=1997JMBUK..77.1109N |s2cid=85748957}}</ref> During mate competition males also participate in a technique called flushing. This technique is used by the second male attempting to mate with a female. Flushing removes spermatophores in the buccal cavity that was placed there by the first mate by forcing water into the cavity.<ref name="ReferenceA"/> Another behavior that males engage in is sneaker mating or mimicry – smaller males adjust their behavior to that of a female in order to reduce aggression. By using this technique, they are able to fertilize the eggs while the larger male is distracted by a different male.<ref name=NormanEtAl1997/> During this process, the sneaker males quickly insert drop-like sperm into the seminal receptacle.<ref>{{cite journal|last1=Iwata |first1=Y. |last2=Ito |first2=K. |last3=Sakurai |first3=Y. |s2cid=43094931 |title=Effect of low temperature on mating behavior of squid ''Loligo bleekeri'' |journal=Fisheries Science|date=2008 |volume=74|issue=6 |pages=1345–1347 |doi=10.1111/j.1444-2906.2008.01664.x|bibcode=2008FisSc..74.1345I}}</ref>