Thanks everybody. One of the things that always bothered me about alot of alien animal designs was that they seemed a bit... unoriginal. Too much like an animal that you'd see on earth. So, I decided to go out on a limb a bit for these guys. One of things I'm very happy with is the replacement of the upper jaw of the Swordjaws with two spikes. I wanted to make it look plausible, but very alien.