The Red Sea harbours over 400 coral species, many found nowhere else on Earth. This ancient concentration reflects millions of years of isolated evolution in a unique oceanographic setting.
Coral Endemism and Evolution
The Red Sea’s geographic isolation created a closed evolutionary system. Coral species that entered the Red Sea millennia ago diverged from distant relatives, resulting in endemic lineages.
Many Red Sea coral species are morphologically distinct from their closest Indian Ocean relatives. Over long timescales, isolation drives speciation—the formation of new species from ancestral populations.
Unique Coral Communities
Red Sea coral communities reflect high temperatures and high salinity. The result is a simplified but highly adapted coral fauna compared to the Coral Triangle or Caribbean.
Dominant groups: Pocillopora, Acropora, Porites, Fungia, and Agaricia. Soft corals, particularly gorgonians, are less abundant than in other tropical reefs.
