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The Rainbow Trachyphyllia Coral (Trachyphyllia geoffroyi), often called a Rainbow Open Brain Coral, is an exceptionally prized large polyp stony (LPS) coral featuring a deeply folded, fleshy mantle patterned with alternating bands of red, green, pink, and metallic blue. Highly sought after by collectors for its incredible kaleidoscope of colors under actinic reef lighting, it is a hardy, bottom-dwelling centerpiece that is well-suited for beginner and intermediate hobbyists alike.
Tank Requirements
Lighting: Low to moderate (50–120 PAR); direct, high-intensity lighting will quickly cause its multi-colored flesh to shrink, recede, or bleach.
Water Flow: Low to moderate; requires a gentle, indirect current to help clear away detritus without forcefully blowing the flesh against its sharp internal skeleton.
Temperature: 72°F – 78°F (22°C – 26°C).
Salinity (Specific Gravity): 1.023 – 1.025.
pH Range: 8.1 – 8.4.
Care and Feeding
Placement: Bottom of the aquarium, placed flat on a soft sandbed or a low, smooth rock flat where its expanding tissue will not scrape against rough edges or get punctured.
Diet: Photosynthetic via zooxanthellae, but exhibits a massive feeding response at night and grows best when spot-fed weekly with mysis shrimp, chopped krill, or fine pellet foods.
Temperament: Semi-aggressive; it does not standardly extend long sweeper tentacles but can expand its flesh significantly during the day, meaning it requires a few inches of clearance from neighboring corals.
The Rainbow Trachyphyllia Coral (Trachyphyllia geoffroyi), often called a Rainbow Open Brain Coral, is an exceptionally prized large polyp stony (LPS) coral featuring a deeply folded, fleshy mantle patterned with alternating bands of red, green, pink, and metallic blue. Highly sought after by collectors for its incredible kaleidoscope of colors under actinic reef lighting, it is a hardy, bottom-dwelling centerpiece that is well-suited for beginner and intermediate hobbyists alike.
Tank Requirements
Lighting: Low to moderate (50–120 PAR); direct, high-intensity lighting will quickly cause its multi-colored flesh to shrink, recede, or bleach.
Water Flow: Low to moderate; requires a gentle, indirect current to help clear away detritus without forcefully blowing the flesh against its sharp internal skeleton.
Temperature: 72°F – 78°F (22°C – 26°C).
Salinity (Specific Gravity): 1.023 – 1.025.
pH Range: 8.1 – 8.4.
Care and Feeding
Placement: Bottom of the aquarium, placed flat on a soft sandbed or a low, smooth rock flat where its expanding tissue will not scrape against rough edges or get punctured.
Diet: Photosynthetic via zooxanthellae, but exhibits a massive feeding response at night and grows best when spot-fed weekly with mysis shrimp, chopped krill, or fine pellet foods.
Temperament: Semi-aggressive; it does not standardly extend long sweeper tentacles but can expand its flesh significantly during the day, meaning it requires a few inches of clearance from neighboring corals.