I have a yellow. In the stores, the yellows look gaunt to me. But mine filled out nicely with decent feeding. He is a nice fish. I also have a Kole tang which goes well with the yellow. They spar briefly at times but they don't seem to damage each other. Oddly enough, my male bengai cardinal will pretend to have a tang when dealing with the kole or yellow tang. The weird thing is that they both believe him and back off!