Discus Coral

About

Discus coral (Zoopilus echinatus) is one of those corals that stops you in your tracks once you realize just how big a single colony can get. Commonly growing beyond half a meter across in the wild. Found across the Western Central Pacific, this species occupies sheltered, deeper reef environments down to around 35 meters, where low flow and subdued light suit its naturally calm habitat. The colony forms a free-living dome shape, thin-walled and somewhat delicate in structure, with septa radiating outward from a central corallite in a pattern that gives the whole disc a very organized, almost geometric look. Tall septal teeth add a fine texture to the surface, and a distinct line appears where different groups of septa converge. In the wild it tends toward a deep brown coloration. In the aquarium, Zoopilus echinatus is considered a manageable choice even for less experienced reef keepers, as long as modest lighting and gentle water movement are provided. Conditions that reflect its natural preference for calm, protected settings. It should be placed on a sandy or open substrate rather than mounted on rock, since these corals are not attached in nature and need to rest freely. Not a coral you see in every tank, but a genuinely interesting piece for a low-flow reef setup.