Shipwreck zombie! Use a similiar outfit, and spruce it up with some seaweed plants in the hair, some shells as well, like I was dragged through the seafloor and then makeup. Pale (well, paler) out the face the face, add some circles under the eyes and such. Not too much in the ways of decomposition because saltwater is an excellent preservative, but just a bit. I'd drench myself in water if I could, but seeing as it's going to be late October that might not be the best idea. So, yeah. Doable. Especially since I already own most of the stuff I need sans the seaweed which I can get at work, and the makeup which maybe the group of us might be getting as group since we have a bunch of zombies we need to create. Cool.