Open brain coral
Trachyphyllia geoffroyi
Trachyphyllia geoffroyi forms massive, rounded or elongated colonies up to 30 cm in diameter. The polyps are large and fleshy, with short tentacles and visible mouths. Coloration ranges from green, brown, red, orange to purple, often with contrasting patterns. It is generally solitary but can coexist with other corals at a distance. No obvious sexual dimorphism.
Recommended parameters
| Parameter | Recommended range |
|---|---|
| Temperature | 24–27 |
| pH | 8.1–8.4 |
| KH | 8–12 |
| Salinity | 1.023–1.025 |
| NO₃ | ≤ 20 |
| PO₄ | ≤ 0.1 |
Care
Care notes
A tank of at least 100 liters is recommended, with moderate to intense lighting and low to moderate flow. Stable parameters are essential: temperature 24-27°C, pH 8.1-8.4, salinity 1.023-1.025, calcium >400 ppm, magnesium >1200 ppm, KH 8-12 dKH. It tolerates nitrates up to 20 ppm and phosphates up to 0.1 ppm. It feeds on zooplankton and can be target-fed meaty foods. Beware of stinging tentacles at night; space it at least 15 cm from other corals.