I have a rare juvenile Australian muelleri butterfly (Chelmon muelleri) finishing up in QT that I don't think I will be keeping. They are hardier than copperbands, great aptasia eaters. I've had it a couple months now. It eats all manor of frozen foods very well. ~3.5".
$250 OBO ( I paid $250 from LiveAquaria Diver's Den).
Begging for food at the water surface