Thank for the reply, I removed this bad *** last night. I got lucky, it ventured out on a rock near the periphery of my aquascape so I was able to just pull the entire rock out and then shake him off in my sump. I also spotted 2 other crabs last night. A gorilla crab on my red monti and some type of xanthid in my birds nest so I got those little suckers too, unfortunately the little crab in the monti lost a leg cause he wouldn't let go, but I don't have to worry about these monsters eating anything in my tank anymore.