You mean the image of the little hippo tang inside the branches of the coral?
The original photo is actually mine, so I can tell you with certainty that it is not an Acropora, but it is a Seriatopora sp. Likely S. guttatus or S. caliendrum.
Red Sea's advertising blew the white balance completely out of reality (sadly) so the coral looks all purple. With the original image and in reality it was green with a tan base.