I understand how much you want to keep regal in your tank (I've been there....) Well, it's not that they are impossible to feed. I've seen some of them actually eating quite well. The problem is they get easily damaged in the process of transporting and handling. I know some of the collectors still practive the use of cyanide. Also, it is their dietary requirements that make them so hard to keep alive incaptivity. They require lots of sponges in their diets. Without them, they simply perish even though they''ve been eating well (like rock beauty). Overall, they are not recommended. Another problem is that ,with such competitive tankmates as yellow and regal tangs, regal might have hard time acclimating. There are many other attractive dwarf angels out there, or as said previously, get maculosus angel. If you're still not dissuaded from keeping regal, make sure you have LOTS and LOTS of live rocks, and get a hold of a healthy specimen (prefarably from Red Sea).