large angels can decimate your coral, sometimes its a nip, sometimes its a chunck, sometimes they ignore them all together.
as DrHank stated the Genicanthus family is reef safe. I have a mated pair of swallow angels, wonderfull fish.
Is this for your 65? If so forget it, these fish need a TON of room. IMO they are more active and need more room than most tangs. You might want to look at dwarf angels, though im not sure youll find a reef safe one.