A colony of Blastomussa wellsi consists of a small group of corallites each with its own fleshy polyp.

The mantle extends from the polyp over the corallite wall and obscures the underlying skeletal structure.

This coral is brightly coloured, being dark red, green, grey or blue, often with contrasting oral discs.

The polyps supplement this by the capture of zooplankton with their tentacles and absorption of dissolved organic matter from the water.

The population trend is unknown but it is probable that the number of mature colonies is decreasing as a result of destruction of its reef habitats.