Hi all, I have identified what I am pretty certain to be a decorator crab, and he is steadily growing. My invert books say get rid of this destructive little critter, (which is fine by me, he looks like a spider). The only problem is, the books dont tell me how to get rid of him. He lives in a nice rock with mushrooms on it, and I was trying to think of how to get rid of him. All ideas would be appreciated!