my sister got a new crab today on impulse, without having him come out. When we saw him, he we found he had only both pincers, the two back legs and one walking leg. He's also sort of blue, but does have a purple BP, I'm not sure if blue is normal? He is digging now, but I had a similar situation crab dig down and die, so is there anything else I can do? How long have you had the crab(s) in question? less than an hour Do you know what species they are? probably PP Did you/Do you isolate new crabs? no Tank Size: 10 gal Lid Type: wire Placement of tank in your home: upstairs bedroom bookshelf Substrate Used (moist or dry & depth): moist eco-earth, about 4" Type of Gauges: Strip/Analog/Digital Analog Did you test your humidity gauge for accuracy? no Placement of Gauges: back of tank, away from the light and not above water Temperature and Humidity levels in your tank: Degrees % 77 degrees, humidity 65% but just bought and added about 3 minutes ago Heating Source (if UTH how much of the tank does it cover and how much substrate is over it):none yet What types of climbing things/toys do you have in your tank? plant What type of water do you use (dechlorinated tap/spring water)? dechlorinated tap If you use dechlorinating drops-which kind? zoo med Do your provide fresh and salt water? If yes, what type of salt mix do you use? yes, zoo med salt water stuff Do you provide dishes for water or just sponges? both How many extra shells do you have for each crab? >3 Do you only handle your crabs with clean hands? yes How often do you handle them? whenever they come up when I'm awake... maybe once a week Have they been exposed to toxins such as chemical/cleaning fumes, perfume, spray deodorant, etc? not here, can't speak for Petco Do you allow your crabs to exercise outside the tank? occaisionally What types of foods do you feed? dried fruit, pellets, egg, eggshell, ground beef, What do you use as a calcium supplement? cuttlefish bone mixed in food/honey </span> A lot of these questions probably aren't relevant because he's been here about half an hour,but two others have been there a few months- one just finished his first molt, the other is probably down molting. Any suggestions for the new guy's health would be great.