Scientists have discovered what they're calling the world's largest coral structure in the Mariana Islands, measuring an incredible 14,500 square feet. The massive coral was found inside an underwater volcano during a research expedition in May 2025.
Marine scientists have made an extraordinary discovery in the Pacific Ocean, finding what appears to be the world’s largest coral structure within the Mariana Islands region.
The enormous coral formation spans an astounding 14,500 square feet and was located inside an underwater volcanic crater during a research expedition conducted by NOAA scientists in May 2025.
The remarkable find was made within the protected waters of the Mariana Trench Marine National Monument, where researchers were conducting underwater surveys of marine life and coral ecosystems.
This massive coral structure represents a significant scientific discovery, as its size surpasses any previously documented coral formation of its type. The finding highlights the incredible biodiversity that exists in some of the world’s most remote ocean locations.
NOAA researchers documented their discovery through underwater photography and video, capturing images of divers swimming alongside the colossal coral to demonstrate its impressive scale.
The discovery was made possible through advanced underwater exploration techniques that allow scientists to study deep-sea environments that were previously inaccessible to researchers.
This finding adds to the growing body of knowledge about coral ecosystems in protected marine areas and underscores the importance of conservation efforts in preserving these unique underwater habitats.
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