Field note / 01 — Pemuteran Bay, Bali

Biorock® Technology accelerates coral growth up to 5x and enhances survival during severe marine heatwaves up to 50x, regenerating entire coastal reef ecosystems.

Technology / 02 — Mineral Accretion

Safe low-voltage electrical fields stimulate crystalline aragonite limestone growth, creating indestructible living breakwaters that protect sinking islands from sea level rise.

Expedition / 03 — Marine Biodiversity

Schooling fish and benthic marine life settle spontaneously in high densities around energized Biorock structures, restoring artisanal food security across island nations.

Global Mission / 04 — Climate Resilience

Founded by Wolf Hilbertz and Dr. Thomas J. Goreau, GCRA is a 501(c)(3) scientific alliance empowering coastal communities with clean solar reef restoration.

02 / Technology & Field Work

From mineral to meaning.

Restoration works when technology serves a place, and a place has a voice.

Marine scientist inspecting coral growing on a Biorock frame
Biorock® Mineral Accretion Technology

Build a place for coral to come back to.

Mineral Accretion Technology (Biorock®) was invented by the late architect Wolf Hilbertz and Dr. Thomas J. Goreau. It uses safe low-voltage electrical currents in seawater to grow natural crystalline limestone, accelerating coral growth and survival up to 5x even under extreme thermal stress.

Explore the full Biorock scientific specification →

A method with a memory

“A reef is not a project. It is a relationship.”

We pair field-tested electrochemical engineering with the patience and stewardship of local coastal communities.

Core Programs

  • ⚡ Electrolytic Reef Restoration
  • ????️ Satellite Bleaching HotSpot Tracking
  • ????️ Living Breakwaters & Shore Protection
  • ???? Community Coastal Capacity Building
03 / The evidence

Look closer.
Act earlier.

Good restoration begins before the crisis. Our science turns signals in the water into decisions on shore.

01

HotSpot Bleaching Prediction

A field-facing satellite forecasting method to anticipate thermal stress, share open data, and give coral communities actionable time to respond.

02

Coral Disease Research

Decades of field documentation, bacteriological analysis, and practical protocols to track and treat emerging marine pathogens.

03

Ridge to Reef Watershed Resilience

Because what washes down hillsides decides what survives below, holistic soil carbon and watershed management are vital to reef survival.

Macro detail of coral polyps in historical archive
Plate 014 / Porites — From the GCRA historical coral photography archive.
04 / The archive

The reef
remembers.

For decades, our photographers and field teams have maintained an unprecedented visual record of coral ecosystems across the globe — serving researchers, educators, and conservationists.

Enter the Photography Archive →

Recent Updates

Field Dispatches

Peer-Reviewed

Latest Papers

Video Archive

Latest Videos

Support Restoration / 501(c)(3)

Keep a future
in the water.

Your 100% tax-deductible contribution directly funds field materials, clean energy systems, and scientific training for coastal reef stewards worldwide.

Global Coral Reef Alliance is a registered 501(c)(3) nonprofit organization.