Bottlebrush Coral

About

Bottlebrush Coral (Acropora elseyi) is one of those Acroporas that earns its common name at a glance. The colony builds itself into a shape that genuinely resembles a fir tree, with main branches carrying radiating side branches that grow progressively longer toward the base, creating that layered, brushy silhouette. Both the axial and radial corallites are notably small with thick, rounded walls, giving the branches a dense, sturdy texture. Coloration tends toward yellow or cream, often with paler tips that catch the light nicely. In the wild, this species occupies shallow reef slopes and fringing reefs across a broad Indo-Pacific range, from the Indian Ocean east well into the Pacific, typically in the top 16 meters where light and water movement are intense. That natural habitat tells you most of what you need to know about keeping it: this coral wants serious light and strong, consistent flow. It also worth noting that branch development varies considerably depending on conditions, so the same species can look quite different from one tank to another. Like most Acroporas, this one belongs in the hands of experienced reef keepers who already have a stable, mature system dialed in. It is not a coral that tolerates much in the way of parameter swings or suboptimal conditions.