Found the official name of this one being Oval butterflyfish ( Chaetodon lunulatus ). The Red-tailed bff is Chaetodon collare and if we look at the ( beautifull ) picture, this one doesn't have a red tail at all. Evenso, a beautifull photo of a beautifull fish, thanks for sharing Hix !
Thanks for picking that up, what I should have put was Red-fin Butterflyfish, and it's also known as the Pinstripe Butterflyfish. I'll make the correction!
