MI are easy if you managed to get a already feeding specimen.
MI are not tangs, they are the one and only species of the genus Zanclus (Zanclus Cornutus) they will initially classified under Chaetodon (Butterfly) but was later re-classified by Linneaus 1758.
Unlike tangs, they are do not have the bony blades near the end of their tails.
MI are omnivores and been known to consume large quantity of sponges.
From my personal experience having kept 1 for 2.5 years, they are very territorial once established and will attacked any new laterally compressed fish regardless of species.
A majestic fish will long dorsal.