This is not my tank, it's e55md's, I just take care of it...
He has a pair of Wrought Iron Butterflies in a 400 gallon, for close to 4 years. They haven't really shown any interest in the corals. The tank is kept at 72 degrees. This has proven to be the biggest hinderance to getting much growth out of the corals. However, the trade off is a pair of fish that are really unique!
The Gorgonians, Star Polyps, and some leathers, are the least targeted of the corals. They grow at a rate that can be noticed, and are rarely picked at, if at all.
The Queen Angel, and Larvatus have proven to be the most problematic for the corals.
You can see the pair in the last pic.