Cherub Angelfish In A Reef Tank

So I picked up my new cherub angel fish yesturday at the lfs. What corals will i be safe with and what corals will he eat? I currently just have a small colony of zoanthids

 

Mine nipped at my clams, never touched a coral.

 

Are there any corals that he will nip at more than others?

 

I had every coral possible in my tank, he never even looked at them.
Great fish IMO except for 3 things.

1. Nipping at clams.
2. This Angel will try to dominate smaller more passive fish, such as Fire fish or Gobies. Angels IME are always better to add last instead of first. If you do add more passive fish in the future you may have to change up the scape some, put the Angel in a breeders box until the new fish is acclimated and comfortable, or try distraction like taping a small mirror to the side of the tank with introduction of new fish.
3. Introduction of another Angel may be impossible in smaller tanks. This little Angel packs a punch once established.

 

I left for a couple hours and came home to a bunch of poop, and I mean A LOT! Is this normal or did I just scare the crap out of him putting him in a new home. If it is normal, would nassarius snails do the trick?