I bring you a big database of cephalopod genes. http://www.uniprot.org/taxonomy/6605 EDIT: So maybe I should talk more about them. You'll notice that a lot of them look curiously like genes from vertebrates and other phyla - for example, alcohol dehydrogenase and complexin. Even cephalotocin and octopressin are cephalopod analogs of oxytocin and vasopressin. There are a few interesting genes, though. The s-crystallins form cephalopod lenses (which are made out of hard protein; I've handled a Humboldt squid eye and the lens feels like a marble because it's made of crystallized protein), and cephalotoxin is, of course, one of the various types of venom octopuses produce.