Growing in a ‘dendritic’, or tree like, shape. Long, tapered branches with regular splitting. This is one of the fastest growing forms, as all of the polyps on a branch contribute to skeletal growth in a single direction. Generally these corals grow fast when conditions are good, but are easily susceptible to mortality due to temperature increases, algae overgrowth, or predation.
On Koh Tao they can be found in high abundance in shallow, flat reef zones such as Ao Leuk, Chalok Ban Kao, and Hin Wong, and the bays around Koh NagnYuan.