• Welcome to TONMO, a community of cephalopod experts, hobbyists and enthusiasts. Established in 2000, we are the founders of TONMOCON, and birthplace of World Octopus Day and Cephalopod Awareness Days. ...You can register here, and Introduce Yourself. To rid yourself of ads and enjoy other perks, become a Supporter for just $50/year. (Now accepting bitcoin & other crytpo!) ...Follow us on Twitter and YouTube for more cephy goodness.
  • Looking to buy a cephalopod? Check out Tomh's Cephs Forum, and this post in particular shares important info about our policies as it relates to responsible ceph-keeping.

female or male

dude

Banned
Banned
Joined
Sep 18, 2007
Messages
36
I am new to tonmo I was wanting to know how you sex a octo :sun::sun::boat::tomato::tomato::tomato:
 


Joined
Sep 8, 2006
Messages
2,390
3rd right arm. If it's the end is the same as the rest, female. If it's got a different end (no suckers, almost flat or blunt), it's called a hectocotylus, and the octo is a male.
 
Joined
Dec 16, 2005
Messages
672
It is hard to be sure until you see eggs or not, but males have a Hectocotylus, which is what they use to transfer sperm to a female. It is typically the 3rd right arm of the octo. The octopus will usually keep the end of his Hectocotylus coiled at all times to protect the tip which is where the opening to transfer sperm is. There are other features that could distinguish it (depends on species the octo could have any or none of these) that include larger suckers and that arm being a little shorter than the others.

Edit: Grrr... Animal Mother beat me to it
 


Latest Posts


Top