divepix - Boulder Brain Coral

Boulder Brain Coral

Aspect:	Greenish domed-shaped mass on which the tight colonies' brown ridges develop a semi-geometrical maze pattern. These boulders can grow into very large diameter mounds.
Population:	Common.
Notable feature:	The septa barely cross at the top of the ridges giving the impression that there is a dividing lane running atop the ridges. The slopes of the ridges do not run straight down to the valley but instead abruptly take a gentler slope to meet the opposite ridge slope. These green slopes themselves have a finely corrugated surface.
Environment:	Low-gradient slopes, starting from depths of a few metres.
Behaviour:	Polyps tend to emerge from the sides of the ridges at night only.