CoralSaltwaterIntermediate

Branched Sandpaper Coral

Psammocora contigua

A smoothly textured, shape-shifting coral that thrives across shallow Indo-Pacific reefs.

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About

Found across shallow Indo-Pacific reef environments, Psammocora contigua is a small-polyp stony coral with a quietly distinctive look. Colonies can take on several growth forms. Flattened branches, columnar structures, irregular nodules, or occasionally free-living ball shapes that simply rest on soft substrate rather than anchoring to rock. What ties all these forms together is the surface texture: the corallites are fine and shallow, giving the colony a notably smooth appearance compared to the deeply sculpted look of many other SPS corals. Coloration runs from pale to dark grey-brown, which is understated by reef standards, but there's something appealing about its clean, almost sculptural quality in the aquascape. In the wild it occupies a broad depth range in tropical to subtropical waters, turning up on hard reef structure as well as sandy and soft-bottom areas, which hints at its adaptability. In the aquarium it's generally considered an intermediate-level coral. Not as demanding as the most finicky SPS species, but not quite the hands-off experience of a soft coral either. Moderate lighting and moderate flow suit it well. It's a good choice for the reefer who has moved past the beginner stage and wants to start working with small-polyp stony corals without jumping straight to the most sensitive options.

At a glance

Type: Coral
Water: Saltwater
Origin: Indo-Pacific. Tropical to subtropical.
Reef safe: Yes
Lighting: Moderate
Flow: moderate

Care guide

Place in moderate light and moderate flow areas of the reef. Position colonies on stable rockwork or allow ball-form colonies to rest freely on sand. They adapt to either setting. Feed occasionally with small particulate foods like phytoplankton or coral-specific supplements, though photosynthesis provides most nutrition. Watch for recession at the base, which can indicate inadequate flow or light; adjust placement before conditions worsen. Maintain stable calcium, alkalinity, and magnesium for skeletal growth. Avoid direct powerhead jets that cause excessive polyp stress. More resilient than delicate SPS but still benefits from consistent water parameters and established systems.

Breeding

Psammocora contigua reproduces via broadcast spawning in nature, but captive breeding is rarely documented. Fragging is possible for propagation: cut healthy branches or sections with a wet saw, allow cut surfaces to heal briefly, and mount fragments on rubble or rockwork with flow and light similar to parent colony. Success depends on stable conditions and patience; fragments may take weeks to establish. Not recommended for beginners attempting coral propagation.