Never known a trigger to be 'reef safe'. Keep him fat-n-happy and lots of shells to crunch on... Or your reef safe trigger will go a hunting.
Isn't this the one that makes grunting noises?
Nice pick up. Here's some good info on them.
Fish Profile: Blue Throat Trigger Fish, Xanthichthys auromarginatus by Lisa Miller - Reefkeeping.com
Very nice Keith. Nice looking fish. Watch those inverts.
Yeah. "Well fed", "fat-n-happy" seem to be the key words to adhere to. Keeps the "exploratory feeding" down as Larry's link says. He's a beaut! if I ever get my tank back up, he just might be on my list. Although I like to feed every other day and have a habit of leaving town for up to 7 days in the summer. Maybe his exploratory feeding might kick in with my habits.