Starry Cup Coral

About

Starry Cup Coral (Acanthastrea subechinata) is a solid, unpretentious reef coral that tends to form small encrusting to massive colonies with a notably compact, heavy structure. Each corallite is roughly circular with thick walls, and the septa, the blade-like ridges radiating toward the center, carry evenly spaced, bead-like teeth along their margins, giving the surface a subtly ornate, almost stitched appearance up close. The fleshy tissue that covers the skeleton is thick but relatively smooth, without the deep concentric folds you see in some related corals. Coloration runs toward uniform grey or green, occasionally with a mottled pattern, which gives it an understated, natural look rather than the flashy fluorescents of some Acanthastrea relatives. In the wild it occupies shallow reef environments, which translates well to aquarium keeping. It appreciates moderate light and gentle flow, and its tolerance for a range of conditions makes it a reasonable choice for reef keepers who are still finding their footing. It does not demand the intense lighting that many SPS corals require, and its small colony size means it fits comfortably into mixed reef displays without crowding neighbors. Placement on rockwork with stable, low-turbulence water movement suits it well.