I think jb9's suggestion is right on the money, Manx! I haven't tried to vac seal any Alaskan King crab yet...simply because it doesn't last that long in our house[:p][:p], but I've got half a case, fresh from Dutch Harbor, waiting for me at home this weekend, so I'll be sealing some of it up in Foodsaver bags. I'll wrap the legs in a few layers of paper towels first, then stuff in long bags to seal.
I've used paper towels before, inside the bag, when trying to seal up wet stuff, (like raspberries, rhubarb, etc.), by rolling up a sheet into about a 1/2 to 1" strip and placing it across the mouth of the bag before sealing. The paper towel strip captures the moisture before it can get out to the sealing edge of the bag...works great!
35 years of extinguishing smoking stuff and now I'm wondering WHY!
Kummok @ Homer, AK USA