Ugly black crab

[Madreefer]

Originally Posted by Treebeard

I got a glimpse of something similar peaking out from under a rock on the weekend. I also had a two year old cleaner shrimp go AWOL a few days ago and I wonder if the crab is the culprit. How do you go about collaring one of these bad guys?

Put some food in a tall drinking glass and place it in your tank at an angle so that when he goes in he cant climb back out. Do it at night and he'll most be in there in the morning.