Bi-Color Dwarf Angel and Live Rock

I have had a Bi-Color Dwarf Angel in a 45 gallon tank going on 5 years now. When I started I had Xenia, frogspawn, mushrooms and there were all sorts of critters living in my live rock. After the 5 years I (very slowly- lost all of my Xenia and frogspawn - only remaining is mushrooms and leather. What bothers me more is that I just set up a 37 gallon 4 months ago and all of the live rock have small worms, little stars, etc. making it such a joy to watch but the live rock in my 45 gallon with the Bi-Color has NOTHING living in them.
I know that Dwarf angels eat some corals but do they also dine on the live rock critters?
Is he the cause of my "boring" rocks?