• TONMOCON VII Announced | MBL at Woods Hole | Apr 6-8, 2018
  • Thanks for visiting! TONMO is the world's greatest online cephalopod enthusiast community, with interactive content going back to May of 2000, and a biennial conference. If you'd like to join in on the fun, become a TONMO member -- it's easy and free. You can follow us on Facebook and Twitter for more cephy goodness.

Only slightly ceph: swima worms and comparative morphology


Colossal Squid
Staff member
Oct 19, 2003
Thanks to Phil for pointing this one out. In a recent Science publication, Karen Osborn et al. describe a new class of deep sea dwelling worms, that go by the name of swima worms. They have some interesting attributes with regard to bioluminescence, such as the ability to "drop" little light bombs to distract would be predators. When I saw one particular species in the accompanying photographs, I was really struck by how basic some adaptations are that lead to diverse groups of species such as Cephalopods and, say, Anomalocarids, all derived from the same segmented bodyplan. The second specimen from the left in the accompanying photograph (C.O. BBC Science news) being a fine example of all the building blocks being available.



Oct 16, 2008
Clearly, segmentation and specialization of body segments were a fundamental factor in the diversity and adaptive radiation of successful groups like the arthopoda and annelida.

The video in the link below shows how beautifully one of these animals uses its parapodia for locomotion.


Cheers, ob.

Members online

No members online now.