Like an easier echinata. Although Sanjay calls this a turaki in the reefbuilders video of his tank, it's more likely Acropora longicayathus, or maybe awi. At any rate, it has a very distinct growth form: always straight up, regardless of light or flow, and always making a colony that looks like a forest of conifers ( hence the name). Very unique, very architectural, and very worth having.
1.5-2in frags