page_title: Platygyra lamellina
section_title: Description
hierarchical_section_title: Platygyra lamellina / Description
caption_attribution_description: English: Platygyra lamellina (Hard brain coral) up close
context_page_description: Platygyra lamellina, the hard brain coral, is a species of colonial stony coral in the family Merulinidae. It occurs on reefs in shallow water in the Indo-Pacific region. The International Union for Conservation of Nature has assessed its conservation status as being "near threatened".
context_section_description: Colonies of P. lamellina usually form massive rounded mounds, sometimes with nodular swellings, but may also form flat plates. The corallites are long, narrow and meandering, with thick walls which are up to one and a half times the thickness of the valleys between them. The septa protrude slightly and are rounded and even; they are very neatly arranged, and cross the valley walls. This coral is usually some shade of brown, with the valley bottoms sometimes being greenish or grey. It can be distinguished from the otherwise similar Platygyra daedalea by the thickness of the corallite walls and the more rounded septa.
caption: Platygyra lamellina showing meandering corallites and evenly arranged septa
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