Siderastrea siderea

0-2000m
1614 sites
Rhizangiidae
Imagine gliding over a vibrant coral reef, the sun dappling through the water, and spotting a low, encrusting mound of pale beauty – that could very well be Massive Starlet Coral (Siderastrea siderea). While its 'massive' name might be a bit misleading as its size is undocumented, this coral is an important reef builder, forming small, rounded colonies that add to the complex architecture of the underwater world. Divers and snorkellers are most likely to encounter it in the warm waters of the Caribbean, Eastern Pacific, and South Atlantic, typically in shallower, sunlit areas. Though not the flashiest coral, its subtle beauty and role in the ecosystem make it a worthwhile find. Keep an eye out for its distinctive star-like patterns on the surface, which give it its common name, and appreciate its contribution to the overall health of the reef.
Massive Starlet Coral is typically seen as a low, rounded or irregular mound, often pale brown, grey, or cream in colour. The most distinctive feature is the presence of small, star-shaped corallites (the skeletal cups where individual polyps live) densely packed across its surface. The overall texture appears finely granular. Unlike branching corals, it forms solid, encrusting structures.