CoralSaltwaterIntermediate

Brazilian Starlet

Siderastrea stellata

Also known as: Brazilian starlet coral

A tough, reddish reef builder that thrives where few corals dare to go.

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About

The Brazilian Starlet (Siderastrea stellata) is one of the hardier representatives of the stony coral world, originating from shallow lagoons and intertidal pools where conditions can swing from calm to punishing. That background shows in its constitution. This is a coral that has earned its place in the wild by tolerating the kinds of extremes most reef species simply cannot handle. Its colonies form dense, rounded masses with a warm reddish-brown coloration broken up by paler walls between the corallites, giving the surface a distinctive, textured look. Up close, each corallite is small and shallow, roughly 2.5 to 3.5 millimeters across, with gently curved septa that are finely granulated rather than smooth. Occasionally a colony will take on a free-living, ball-like form rather than attaching firmly to the substrate, which is unusual enough to be worth noting. In the aquarium, it appreciates solid lighting and moderate water movement to keep its surface clean and well-oxygenated. While it is more forgiving than many small-polyp stony corals, it still calls for reasonably stable conditions and some experience reading coral health, placing it comfortably in the intermediate category for reef keepers.

At a glance

Type: Coral
Water: Saltwater
Origin: Shallow lagoons and intertidal pools.
Reef safe: Yes
Lighting: High
Flow: moderate

Care guide

Position in moderate flow that prevents detritus accumulation on polyp surfaces without creating turbulent conditions. Provide strong lighting. High PAR levels support photosynthesis and color intensity. Feed occasionally with micro-sized plankton or liquid invertebrate foods, though it derives most nutrition from zooxanthellae. Watch for brown jelly disease, which can rapidly spread in stressed colonies; maintain pristine water quality and remove affected tissue promptly if detected. This species tolerates some water parameter fluctuation better than delicate SPS corals, but erratic swings still stress it. Avoid copper medications entirely. Clean the substrate around its base periodically to prevent algae overgrowth.

Breeding

Siderastrea stellata reproduces in the wild through broadcast spawning, but reliable captive breeding is extremely rare and requires precise seasonal and lunar triggers rarely replicated in home aquaria. Fragging is possible but slow and unreliable due to small polyp size and dense skeleton structure; success rates remain low for hobbyists. If attempting propagation, use a wet saw with a diamond blade to create clean cuts, then isolate fragments in calm, low-light conditions for several weeks while they recover. Most hobbyists rely on wild-collected material rather than captive propagation.