At last, biologists get some respect from xkcd…and it features cephalopods. Seriously, no other branch of science has anything as wicked cool as the diversity of life to play with.
By the way, the artist reveals his physics bias when he has the cuttlefish crudely zapping their targets with boring old electricity. A much more subtle and powerful strategy would be to use them as vectors for a modified strain of Vibrio that would infect the brains of their victims, causing them to both glow in the dark and have an irresistible desire to close out their bank accounts and mail the contents to me…but no, I have said too much. He almost got me monologuing there.