I agree pretty much with RichK, except about the tank size thing. I just got one about 3 weeks ago from a fellow reefer in the area. Granted, I know that's not much time for me to get to know the fish type, but I thought I'd chime in. I also tried the Search function in this forum unsuccessfully until I tried it one night at 2am.
The fish does bury in sand when it feels threatened, is a very active swimmer (swims back and forth all day foraging off rocks), aggressive eater, a jumper, and picks pods off rocks all day. It hasn't touched any of my inverts so far.
I have red legged hermits, electric blue hermits, turbo snails, peppermint shrimp, and a cleaner shrimp. So far, everyone is fine and he doesn't bother them. My fish is only about 3.5"-4" though.
I have mine in a 90g. That is plenty of room. I think a 65 gallon would be fine as well. It seems weird that RichK's grew to be 6". From all the literature I've read, they only grow to be about 4-5" in the wild (probably smaller in a home aquarium). If the fish stays 4" or so, I don't see a problem. But if for some reason this fish really does get to be 6", then I could see where 65g might be pushing it.