Knob Coral

About

Knob Coral (Dipsastraea pallida) is a reef-building stony coral found across a broad sweep of the Indo-Pacific, ranging from tropical to subtropical waters and occurring at depths roughly between 6 and 30 meters. In the wild it contributes to the structural complexity of coral reef systems, and it has been documented at sites as well-studied as Apo Reef in the Philippines, where it plays a role in reef zonation alongside other hermatypic corals. Like others in the Dipsastraea genus, it forms a massive or encrusting colony with clearly defined corallites that give the surface a textured, knobby appearance. Hence the common name. Coloration tends toward subdued tones, often creams, tans, or muted greens, though this can shift depending on the zooxanthellae present and local light conditions. In the aquarium, this coral is considered intermediate in terms of care, which generally means it rewards keepers who pay attention to consistent water quality and stable conditions rather than beginners still finding their feet. It appreciates moderate lighting and moderate water movement, both of which mirror the mid-depth reef environments it naturally occupies. Given the right setup, it is a rewarding and relatively undemanding large polyp stony coral for the dedicated reef keeper.