• Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are 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. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.


  1. octobot

    [Biology & Species] Color-changing animals, explained

    From National Geographic: Squid and cuttlefish can flash bands of rippling pigment to signal that they're ready to mate, Gilly says. The displays can be particularly spectacular in ... Continue reading...