• Welcome to TONMO, the premier cephalopod interest community. Founded in 2000, we have built a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up - it's free! You can also become a Supporter for just $50/year to remove all ads and gain access to our Supporters forum. Follow us on Twitter and Facebook for more cephy goodness.

How do you tell a boy octopus from a girl octopus?

Joined
Oct 25, 2003
Messages
1
My son, John, age 9, is doing a research project on the octopus :grad:, and is having a difficult time coming up with a comprehensible description of how to tell a boy from a girl. Can anyone help him out?
With profound thanks from Maine,
John's mother
 

Steve O'Shea

TONMO Supporter
Registered
Joined
Nov 19, 2002
Messages
4,671
Hi John's mum (?Lindsay is it). How much time have you got? If the project can wait two days then I can get back in to work and respond with a couple of photographs of boy/girl characters. Basically the tip of the third right arm (or, rarely third left) of the male octopus is modified into a scoop/shovel (calamus/ligula) - there are no suckers at the end (the female has all 8 arms attenuating to fine, sucker-bearing tips.

There is a section online already that might help ('A guide to frequently used characters, states and measures') that has illustrations of this scoop/shovel (hectocotylus). Please see Figure 4 at http://www.tonmo.com/science/public/measurements.php

I'll post additional pics of whole animals in 2 days
Kindest
Steve
 

Latest Posts

Forum statistics

Threads
20,890
Messages
206,819
Members
8,460
Latest member
Gary T

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak


Top