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.
O. digeuti is sometimes offered for sale...we're lucky enough to be able to collect them locally, but they have really, really short life spans...but they do well in a 20 gallon tank, so a 30 would be fine.