@Ebirah766 most likely it is, but it's hard to confidently rule out the nearly identical Dascyllus abudafur, a recent split from D. aruanus. Unfortunately D. abudafur was split almost entirely from genetic data, and I don't believe there are any concrete morphological differences between it and D. aruanus. I've heard abudafur has a dusky wash to the base of the caudal fin more often than aruanus does, but both species can show this feature. In the wild, these species can be distinguished by location, but obviously this is less useful in a captive context.
