Okay, I have a Flame Angel, and have had him for a little over 6months. I also had a Coral Beauty for several years in my previous system. Basically, the Coral Beauty never touched anything, and so far, the Flame Angel in my new system hasn't expressed interest in anything.
I actually have a collection of marginally reef safe fish: A Majestic Angel, A Copperbanded Butterfly, and a Flame Angel. Life isn't interesting unless you walk the edge, right?
Anyhow, the Majestic Angel and the Copperbanded Butterfly have picked here and there, but I keep SPS, which are of less interest to them, and in each case, it was as simply as removing the objectionable coral. Over the months, they never "moved on" to another coral.
Both the CBB and the Majestic Angel also bothered (but didn't eat) my
T. crocea clam, and so the clam sadly had to go for its health. They never showed any interest in my
T. squamosa
- Certain corals are less likely to be bothered than other corals, so you may plan your tank around corals less likely to be bothered. Yes, certain fish are wholly reef unsafe (parrotfish) and will eat any and all corals, but usually these marginally reef safe fish (Angelfish and Butterfly fish) will go from just bothereing to consuming certain corals but not others.
- If you are like me, and not attached to any one coral in your system (as long as the others are okay), then you always have the option of getting rid of that one coral they bother. I have not observed them to "move on".
Many reefkeepers have kept Flame Angelfish, just be sure that you know that you are running a risk.
Matt
So when everyone says it is hit and miss, it is just that. Some things to consider are that certain corals are:
less likely