[Answer] Which animal's male reproductive organ is actually one of its arms?

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Which animal's male reproductive organ is actually one of its arms?

• Octopus:If you ever happen to get tangled up with a male octopus, be careful which arm you touch. If you reach out to touch the third right arm, it’s more than just his arm, it’s also his reproductive organ. The octopus uses this specialized arm called a hectocotylus to insert spermatophores (packets of sperm), into the female’s mantle cavity for reproduction. Depending on the species, the male octopus may use his reproductive organ as a conduit to the female, or he may remove his detachable penis and present it to the female, for use at her discretion.

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