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Honeycomb Corals


Pencil Squids Mushroom Corals

The family of honeycomb corals, Diploastreidae contains only a single genus, Diploastrea, which in turn has only a single member species, Diploastrea heliopora.

1 species found on this page.

Honeycomb coral

Diploastrea heliopora

Honeycomb coral colonies are easy to distinguish from other coral species, and can grow to massive sizes, creating dense colonies several meters wide. Many coral species have some variation depending on depth, location, water clarity, etc., however this species has very little variation and is easy to identify.

Honeycomb coral (Diploastrea heliopora) @ Koh Haa

Diploastrea heliopora @ Koh Haa

The large polyps live within corallites which are low, dome-shaped and closely packed, creating a honeycomb-like effect.

The corallite walls are thick, but not solid, rather they are formed of ridges which are the enlarged outer ends of the septa. The septa are equal and are thick at the wall and thin where joining the columellae (top/opening of the corallite).

Honeycomb coral (Diploastrea heliopora) @ Koh Bida

Honeycomb coral @ Koh Bida

The coral surface appears smooth and can be cream, grey, light brown or green. This is a zooxanthellate species.

Find Out More: Marine Life References and Further Information

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Diving with Honeycomb Corals

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