Flamehawk, no disrespect to your post, but a naso and anything at all will most likely be the best of friends. They have got to be THE most friendly fish I have ever come across, they never attack another fish and the only fish they might think about roughing up is another naso, which is still highly unlikely. I actually have a naso tang and an emperor angel, and they are THE BEST friends, they almost look like they are "lovers" or something. The naso would never think of attacking the emperor and has never gave two cents about any fish in the tank, they are one of if not the most PEACEFUL fish you can get. So to you and the original poster, yes you can have an emperor and naso together, they will have no problems, unless you get an unruley emperor, as he would be the only one to get roudy. And to the original poster, the naso tangs are one of if not the most coolest fish to watch and own, they are just soooo funny and weird, you have to have one to know what I'm talking about. Get the naso first at about 4" at least, no smaller, and then add the emperor at about 3.5-4" and you will have NO problems what so ever. Good luck to you, Jollygreen