They keep going in and out of that rock and I noticed a tube on one of them is fat and hanging out. I'm curious to see what's inside the rock but don't want to mess with it yet.
Those are breeding colors, mine were bright like that when they spawned, and I agree with smitty, disturbing them is not a good idea. You'll know soon enough, when you see free swimming fry. Just be sure you have plenty of food for them when free swimming happens. I'd be getting my brine shrimp hatcheries going pronto.
I don't plan on it yet but have to soon because I need to drain the tank to replace the sponges. Last night the other fish had the tube out which looked just like the other one so I am going to do this tank last and hold out as long as I can.