If you mean they may nibble on corals, then yes. I had one that took a liking to my Devil's Hand leather coral.
As far as keeping one, they are on-par with an Achilles tang, IMO. (Meaning that you better know what you are doing) They are extremely prone to ich. But if you can get one eating and past the ich phase, they are a great fish. They can be aggressive as well, like most tangs.
Also, they need a pretty good sized tank...