That fish looks like a yellowtail angel or something like a singapore angel. Hopefully he will not touch your corals because both kinds of angels I believe are not reef safe.
Wow..thats exactly it. Ahhhh..what does the LFS know...
Another question though...I see pics of some of the reef tanks and most of the glass looks pretty clean. I have green algae covering the back and one of the sides but I was told not to scrape it off. Yes? No?:notsure: