The Rainbow Welsophyllia (Trachyphyllia geoffroyi / Wellsophyllia radiata) represents the absolute pinnacle of large-polyp stony (LPS) brain corals, highly coveted by collectors for its incredible multi-spectrum pigmentation. Unlike single or dual-color morphs, true “Rainbow” specimens display a stunning array of distinct color bands—blending fiery crimson red, glowing orange, metallic chartreuse green, electric cyan, and deep violet across its deeply folded, pillowy tissue folds.

Coloration: Multi-spectrum rainbow palette displaying concentric bands or marbled swirls of pink, purple, metallic lime-green, electric teal, and royal blue surrounding glowing cyan oral centers.

Growth Pattern: Solitary Meandroid / Flat-Bottomed Dome (builds a heavy, dense calcium carbonate skeleton with a flattened base, expanding outward into a multi-lobed, deeply folded fleshy mantle). Sold as 3-5 inches.

Lighting: Low to Moderate (PAR 50–125).

Water Flow: Low to Gentle (Low, indirect current to allow the massive fleshy mantle to fully inflate without tearing against its sharp skeletal septa).

Feeding: Active carnivore; extends clear feeder tentacles around its oral mouths at night to accept mysis shrimp, chopped krill, LPS pellets, and liquid amino acids.

Aggressiveness: Semi-Aggressive (lacks long sweeper tentacles, but inflates significantly when happy and can sting immediate softies or SPS corals that physically contact its inflated mantle).

Care Level: Easy to Moderate (Hardy and long-lived when placed directly on a stable sandbed, provided low-flow and stable parameters are maintained).