haha. My red sea regal doesn't nip sps. 5-6", but it definitely eyes the sps and then I put some nori in. It demolishes any zoanthid though, but i was willing to give those up, probably worked out better for my sps in the long run anyway removing the zoas.
Majestic Angels are a little "reef safer" and a bit hardier as far as getting them to eat.
The only reason I ended up with a
regal angel in a 75 was that a local reefer didn't realize what he was getting himself into and it had eaten most of his zoas, but nothing he had tried to feed it. I took it off his hands for a few nice frags, and it took a month to start eating.