Oh sorry! Im late, send me to bed!!! (please) I got this info from another site, and the person used shredded paper. I didn't think that was the greatest to use, so I tweaked thier method. Here it is. I haven't shipped crabs, but I think this is the best way to do it. If anyone has suggestions for tweaking it, please share them. Remember this is just what "I" think would be the best way to package them and ship them. "As far as packing goes, I use a cool whip dish, poke lots of holes in the lid and sides of the dish, and fill it half way with reptile moss dampened with dechlorinated water, I place the crabs on the reptile moss. I put some more damp reptile moss on top of them. Then I put the lid on. I let them crawl through the reptile moss, in the enclosed container, and holes for air. I also mist the them and the reptile moss a bit. They crawl through as if its sand or wet leaves and usually huddle together if I am shipping more than one. Then I put this container in a bigger box of shredded paper, making sure the shredded paper is all around the plastic container for support. I do this double packing thing because they won't jostle as much and. So far, ALL the crabs I have shipped have arrived alive, happy and healthy. This way, no one can hear them walking, chirping or making any sort of noise, plus there is more cushion and less jostling. Also I just about always give my crabs a bath before shipping, this way they have more moisture in their shells, as drying out is a big concern. It is usually warm while being shipped but you don't want them getting dried up. They must be shipped overnight. The wet reptile moss will give them humidity they need, plus a food source. "