I keep one of these in my tanks that i don't want Aptaisa in (I copied the discription directly off an internet site):
Sunburst Butterfly Fish
Chaetodon kleini
The flanks of this fish have an attractive golden colouration, each scale being picked out with a darkish spot. These spots under normal top lighting appear to be blue-black, but when the fish is seen under reflected front light, it will be noticed that both spots and the vertical head stripes are a rich purple-blue colour.
This fish is unique among the family Chaetodontidae for its hardiness, resistance to disease and eagerness to feed in captivity. It is sometimes known as the White-spotted Butterfly fish. Of the butterfly fishes, this species is probably the easiest to keep.