• 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. Architeuthoceras

    New Fossil Cephalopod Article

    500 million years of cephalopod fossils | Earth Archives With references to a few TONMO members :)
  2. tonmo

    Nice news article on ceph fossils

    and it credits TONMO (@Phil's article) as a reference: Searching for the Old Ones: Lovecraftian giant cephalopods and the fossil record
  3. DWhatley

    Members' Publications

    TONMO members have published numerous cephalopod papers over the years. This thread forum (Member Papers, Articles, and Published Research) is an attempt to keep a reference list. If you have a published work, please start a post beginning with your member name followed by your Author name...