Photo by V. Laptikhovsky, from BBC Earth News.
While dissecting the mantle of the squid to assess maturity of the animal, the team got a bit of a surprise: some hot squid action. The squid's penis became erect and ejaculated spermatophores on the table. But this is a good thing (although it probably wasn't a lot of fun for the squid to be vivisected in the first place), because until now, there was a lot of question as to how deep-sea squid mated. Many shallow water species of cephalopod used modified arms to transfer spermatophore packets from their mantle to the female, but there was no evidence of such behavior/anatomy in deep-sea species. Well, know we know at least one variety forgoes the modified arm technique, and goes for the gusto with a strong, elongate, 67 cm penis. Good for you Onykia.
Male O. ingens, dissected, with erection. Photo by A. Arkhipkin, from BBC Earth News.