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
Mexico bans captive dolphin shows based on GCRA’s water pollution studies
The Mexican Senate voted unanimously to ban captive dolphin shows for tourism due to decades of pressure by Mexican animal rights groups, supported by water pollution studies done by the Global Coral Reef Alliance. Much of this results from shocking recent...
Oldest known footage of healthy coral reefs rediscovered as they go extinct
By Tom Goreau, June 28 2025 The oldest known underwater film footage of extremely healthy shallow and deep coral reefs, showing Dr, Thomas F. Goreau diiving in Jamaica in November 1957, has just been rediscovered after nearly 70 years lost, sitting in plain sight. The...
Regenerating EARTH: GEOTHERAPY free book download
REGENERATING EARTH: GEOTHERAPY BOOK FREE DOWNLOAD DEFINITIONS Earth is suffering from a life-threatening fever, her temperature is rapidly rising, and she will die unless she regenerates her natural life-support mechanisms before they collapse from abuse and...
LATEST PAPERS
LATEST VIDEOS
Nutrient analysis for integrated water quality management in tropical coastal waters
GLOBAL CORAL REEF ALLIANCE WHITE PAPER: Nutrient analysis for integrated water quality management in tropical coastal waters Thomas J. F. Goreau NOTE: This White Paper consists of two parts: the first, INTEGRATED NUTRIENT MANAGEMENT OF COASTAL WATERS AND WATERSHEDS...
2024 record temperature effects on coral bleaching & ocean circulation
Author’s original version The Author’s Original Version (AOV) is the un-refereed author version of an article as submitted for publication in an Oxford University Press journal. This is sometimes known as the “preprint” or draft version. The author accepts full...
Cleaning sewage pollution in Negril
CLEANING SEWAGE POLLUTION IN NEGRIL May 7, 2024 Thomas J. F. Goreau President, Global Coral Reef Alliance, former Science Advisor, Negril Coral Reef Preservation Society & Negril Environmental Protection Trust Negril: not enough clean water and too much dirty...
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...
Oldest known footage of healthy coral reefs rediscovered as they go extinct
By Tom Goreau, June 28 2025 The oldest known underwater film footage of extremely healthy shallow and deep coral reefs, showing Dr, Thomas F. Goreau diiving in Jamaica in November 1957, has just been rediscovered after nearly 70 years lost, sitting in plain sight. The...
CAYMAN CLIMATE CHANGE ADAPTATION SOLUTIONS
https://www.youtube.com/watch?v=TWmo9SeT7RE
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
