I've had a little blue damsel in my reef for several months. He picks on all the new guys relentlessly. He won't leave the rocks anytime I am near the tank. Last night I went down after the lights went out. It was sleeping in the corner. It didn't even know it was in the net until it was out of water. I never thought of catching a fish while they sleep. Just thought I'd share this incase anyone else is having this issue.
If anyone wants a "blue devil" as I call it, I have one in my sump. No cost, but if you'd like to donate a frag to my tank, I won't complain.