| Aspect: | Colonies grow in a helix pattern and form what looks likes thinly hammer-beaten copper plates, which can be copper or verdigris coloured. Bleached specimens are affected by lack of zooxanthellae. |
| Population: | Common. |
| Notable feature: | White star-shaped polyps occupy the centre of the valleys. |
| Environment: | Grows on reef faces, often with overlapping plates. |
| Behaviour: | - |