Octopuses & relatives

The topic of Octopuses & relatives: Reproduction is covered in 3 sub-sections: COURSHIP & COPULATION, EGG-LAYING & HATCHING, & PELAGIC DEVELOPMENT OF JUVENILES.

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Sexes are separate in octopuses and can be differentiated in mature specimens by the presence of the special hectocotylus on the third right arm of the male.

NOTE lit. “hundred cups” G., referring to its many modified suckers. The hectocotylus has a ciliated groove down its length for delivering spermatophores to the female