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Favia Brain Coral

Favia (and its maze-patterned cousin Platygyra) are the encrusting 'brain' corals - hardy stony domes and plates with a surface of ridged, closely-packed corallites that glow under actinic light and grow slowly into boulders.

Last reviewed: July 2026

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Favia Brain CoralAI illustration

Overview

Favia (and its maze-patterned cousin Platygyra) are the encrusting 'brain' corals - hardy stony domes and plates with a surface of ridged, closely-packed corallites that glow under actinic light and grow slowly into boulders. Tough, colourful and long-lived. (Favia and Platygyra species.)

Origin & Habitat

Indo-Pacific reefs, across a range of depths and light levels.

Appearance

An encrusting or domed stony surface patterned with round cups (Favia) or winding mazes (Platygyra), often green, red or two-tone with strong fluorescence.

Placement & Temperament

Has strong stinging sweeper tentacles at night - give it 10-15 cm of space from other corals despite its slow growth.

Tank & Water Conditions

Salinity 1.024-1.026, 24-27°C, stable alkalinity 8-11 dKH, calcium 400-450, magnesium 1300-1350.

Lighting & Flow

Low to moderate light (about 60-150 PAR) and gentle to moderate flow.

Feeding

Photosynthetic; extends feeder tentacles at night and grows faster with occasional target feeding.

Health & Growth

Very hardy and long-lived. Slow growing, so it needs space kept clear around it because it cannot outrun neighbours.

Pros & Cons

Pros

  • Hardy, long-lived stony coral
  • Strong fluorescent colours
  • Adapts to a range of light

Cons

  • Strong night sweeper tentacles
  • Slow growing
  • Needs cleared space it cannot defend by speed

Everyday gear for a reef tank

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Favia Brain Coral - frequently asked questions

Are brain corals aggressive?

Favia and Platygyra look passive by day but extend long stinging sweeper tentacles at night. Give them 10-15 cm of clear space from other corals.

Why does my favia glow under blue light?

Favias are full of fluorescent pigments that pop under actinic/blue LEDs - one of the reasons they are so prized.

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