my royal groma and my kole tank swim in and out of the rocks all day, so does the pj cardnial. lol I have the oppsit problem none of mine like to stay in the open. what fish do you have?
i have a coral beauty, sailfin blenny which do go into the rocks, but my clowns, firefish and newly aquired fairy wrasse stay to the front. I have a 55 so that limits me somewhat.
I have some lemon damsels and a LMB that love the rockwork I have in my 55 gal reef tank. They swim in and out of the rockwork all the time and the damsels seem to really enjoy hiding out in the rock and then attacking me whenever I put my hand in the tank!
My little azure damsels stay in the rocks, hide in the holes in the rocks, zip back in and out.
They are damsels though so you may not want them, haha.
Bicolor Blenny. Swims through even very tight holes in the rocks. Very enjoyable to watch. He even has a little fued going on with my very indignant camel shrimp, which has laid claim to a little cave that I built into my aquascape.
Falco hawk, or any hawk. They all dart in, on, and around, and watch every move you make. What is your stock list though. What all do you have and what sized tank is this?