I had one and like Desertrat505's male, it picked at everything. Took out all my dusters and picked off my snails one by one. The much larger Turbos and Mexican snails seemed to do alright but I'd still see him pick at them as well and knock them off their rock or glass. I don't have shrimp but I have lots of small hermits and he doesn't bother them at all. the only reef I have is what came on the rocks when I bought them, just some softies and shrooms and he left them alone as well.
I fed mine flakes in the morning and frozen mysis in the evening and he eat both with much liking.
He shared the 90 gal tank with a paired Maroon clown couple and a Lawnmower Blenny and all lived very peacefully, even biting off the same cube of mysis together like lady and the tramp.
I do warn you thou, when it sleeps it latches on to things with its belly some how, rocks, heater, Mag Float, even power heads... that's how I lost mine. It doesn't sleep in the same spots every night, pretty much calls it a night on whatever is closest to it whenever the moon light goes off.
Over all, a very nice and elegant fish to have if you don't mind the occasional snail shell going empty and I couldn't tell you if its reef safe, I'm told its not.
