Angry Squid
You may have heard about the historic photographing of a Giant Squid in action at nearly a kilometre below the surface by a couple of Japanese researchers recently. Well, one thing they managed to do was break off a length of tentacle about 5.5m in length (it got caught on their squid trap thing and the Giant Squid lost it while trying for 4 hours to free itself, poor thing).
Anyway, Mike Monteiro posted the above image (and a few other varients) on flickr and I think that rocks. You can also grab yourself a copy in t-shirt form.