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.
Restoring
Coral reefs and marine habitats all around the world
Protecting
Coastal shorelines from erosion and the effects of climate change.
Helping
Local communities develop sustainable maricuture practices.
RECENT UPDATES
BIOROCK CORAL RESTORATION-BALI: WHERE BIOENGINEERING MEETS THE SACRED
BIOROCK CORAL RESTORATION-BALI: Where BioEngineering Meets the Sacred Ocean Geographic 2026 Best Photograph Competition, First Prize for Music and Pictures, and Michael Aw Award for Excellence, to Maryline Renault for BIOROCK CORAL RESTORATION-BALI: Where...
Growing coralline algae sand against global climate change
June 3, 2026 Growing coralline algae sand against global climate change Thomas J. F. Goreau, PhD President, Global Coral Reef Alliance This new Global Coral Reef Alliance video of a presentation by Tom Goreau at the International Coralline Algae Society Conference in...
OLDEST CORAL REEF PHOTOS
OLDEST CORAL REEF PHOTOS An inaccurate recent BBC story: "It's the rainforest of the sea': These 1960s photos reveal Jamaica's lost underwater paradise", states: “A trove of snapshots from a 1960s diving expedition reveals stunning glimpses of Jamaica's vibrant...
LATEST PAPERS
LATEST VIDEOS
2023 record marine heat waves: Coral Bleaching HotSpot maps reveal global sea surface temperature extremes, coral mortality, and ocean circulation changes
January 22, 2024 2023 record marine heat waves: Coral Bleaching HotSpot maps reveal global sea surface temperature extremes, coral mortality, and ocean circulation change Thomas J. F. Goreau & Raymond L. Hayes The manuscript is a non-peer reviewed preprint...
HOW MUCH FASTER CAN BIOROCK INCREASE CORAL GROWTH?
GCRA WHITE PAPER HOW MUCH FASTER CAN BIOROCK INCREASE CORAL GROWTH? Thomas J. F. Goreau December 10 2023 Record fast coral growth enhancement under Biorock electrical stimulation of up to 4.126 times faster in diameter, 20.7488 times faster in length, and 353.225...
Bad Science and Good Intentions Prevent effective Climate Action
https://eartharxiv.org/repository/view/6244/ Bad Science and Good Intentions Prevent effective Climate Action Graeme MacDonald Taylor, Peter Wadhams, Daniele Visioni, Tom Goreau, Leslie Field, Heri Kuswanto 13 November 2023 https://doi.org/10.31223/X5DT25 Summary...
Electric Reefs Enhance Coral Climate Change Adaptation
Electric Reefs Enhance Coral Climate Change Adaptation, a chapter by Tom Goreau in the book: Corals - Habitat Formers From the Shallow to the Deep (Giovanni Chimienti, Editor), explains how the Biorock process greatly increases resilience of corals and marine...
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...
CAYMAN CLIMATE CHANGE ADAPTATION SOLUTIONS
https://www.youtube.com/watch?v=TWmo9SeT7RE
ECONOMIC AND ENVIRONMENTAL IMPACTS OF TOURISM IN GRAND CAYMAN
Live broadcast of CPR Cayman Public information event on proposed cruise ship port referendum, March 18 2025 Featuring: 1. Community perspectives (0m to 59m) 2. Economic perspectives. Dr. Marla Dukharan. (59m - 1h 58m) 3. Slide show of reefs that will be destroyed by...
HELP US SAVE CORALS
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:
Panama
Jamaica
Vanuatu
Grenada
Bahamas
Philippines
Palau
