The Global Coral Reef Alliance is a small, 501(c)(3) non-profit organization dedicated to scientific research and sustainable management of the most valuable and threatened of all ecosystems—coral reefs.

GCRA is a worldwide coalition of volunteer scientists, divers, environmentalists and other individuals and organizations, committed to coral reef preservation. We primarily focus on coral reef restoration, and cutting-edge research on impacts of coral bleaching, global warming, marine diseases, global sea level rise, and pollution on corals.

GCRA scientists work with community groups, environmental organizations, foundations, governments or private firms to build, restore and maintain coral reefs, nurseries and marine sanctuaries. 

GCRA Projects include restoration of coral reefs and marine habitats for mariculture, tourism and shore protection.

GCRA invented and developed Mineral Accretion Technology™ and the Biorock™ method of electrical coral reef and marine ecosystem restoration, the HotSpot™ method to correctly predict coral bleaching from satellite sea surface temperatures, and integrated whole-watershed and coastal zone nutrient management (now commonly referred to as Ridge to Reef, or Hilltop to Ocean).

Founded in 1990, GCRA is the direct heir to a pioneering coral reef research tradition stretching back to the 1920s, and has the world’s largest collection of coral reef photographs from the 1940s, 1950s, and 1960s.


Coral reefs and marine habitats all around the world


Coastal shorelines from erosion and the effects of climate change.


Local communities develop sustainable maricuture practices. 



Coral Reef Electrotherapy: Field Observations

Coral Reef Electrotherapy: Field Observations

This paper presents the first comprehensive review of all visible biological effects of the Biorock electrolysis method of marine ecosystem regeneration that have been seen since the invention of the method in 1976. Extraordinary benefits are seen for the health of...

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MALDIVES BIOROCK: Past results & future applications

Maldives Biorock Figures compressed January 31, 2022 GCRA White Paper MALDIVES BIOROCK: Past results & future applications Thomas J. F. Goreau, PhD President, Global Coral Reef Alliance SUMMARY The Maldivian way of life for more than four thousand years is under...

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Climate-proofing Coastlines with Biorock Technology

Climate Proofing Beaches and Coastlines with Biorock Technology Biorock Technology grows back severely eroded beaches at record rates by regenerating marine ecosystems and is the most cost-effective solution for protecting...

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UN Oceans: Regenerating the Sea of Cortes

UN Oceans: Regenerating the Sea of Cortes United Nations Oceans Week talk on Regenerating the Canal del Infiernillo, Mar de Cortes, in Sonora, Mexico by Tom Goreau at the World Oceans Week Panel on Sustainable Blue Economy: New paradigm of action with emphasis on the Northwest of...



GCRA, is accepting donations to help fund our programs in 2019, training local communities in developing countries to use Biorock methods for large-scale marine ecosystem restoration and sustainable mariculture for the following projects: