Corail Rayonnant

Overview

Diploastrea heliopora is a unique species of hard coral and the only extant member of the family Diploastreidae. It is well-known for forming massive, dome-shaped colonies that can reach impressive sizes, sometimes spanning several meters across.

Distribution & habitat

This species is widely distributed throughout the tropical waters of the Indo-West Pacific, including the Red Sea. It is typically found in environments with minimal wave action, such as protected fringing reefs, back reef slopes, and silty areas, though it can also inhabit more exposed reef environments.

Appearance

Colonies are characterized by their uniform, dome-shaped structure and even surface. The skeleton is notably dense, featuring plocoid corallites that form low, cone-like structures with thick walls and large columellae. The overall coloration is usually a consistent cream, grey, or occasionally greenish hue. It is considered one of the most easily recognizable massive corals due to its distinct and relatively invariant corallite structure.

Biology & behavior

Diploastrea heliopora is a slow-growing species. Its polyps, which possess tentacles that typically extend only at night for feeding, are hermaphroditic. Recent phylogenetic studies have confirmed its distinct status within its own family, separating it from other similar-looking corals.