Rthoman, This is what I was told to do. Take a piece of squid or shrimp and wrap it with a rubberband and put it into a tall drinking glass by the rock (angled kinda) and when the crab gets in there to eat the bait
he cannot crawl back out and BOOM you have the little guy
I am going to try this method this weekend, I will let you know the results.
Oh has your little critter bothered or killed anything? Mine is getting less shy but only somes out after the lights have been off for a couple of hours.