 " Male @-@ upturned " mating involves rapid back and forth swimming by the courting male beside a slower @-@ swimming female . The male will then flip over so that he is swimming upside down and quickly lunge forward towards the female . He will quickly eject several spermatophores from his funnel into his hectocotylus and attempt to deposit them on the female 's mouth funnel , then jet away from the female . " Head @-@ to @-@ head " mating is regarded as a variation of this tactic . 
