Which arm is the hectocotylus?
octopus uses an arm (the third on the right, called the hectocotylus) as its penis. Most of species, they have an arm called hectocotylus is used to transfer spermatophore to the females. How do you say hectocotylus? noun, plural hec·to·cot·y·li [hek-tuh-kot-l-ahy]. What is a female octopus called? A female octopus, known as a hen, may…