Coral Reefs Yield Trove of Undiscovered Bioactive Molecules

Researchers find vast potential for new drugs, industrial products in coral microbiomes

Apr. 17, 2026 at 3:43am

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A highly textured, abstract painting in earthy tones of green, blue, and ochre, depicting a complex, interlocking network of geometric shapes and organic forms that evoke the intricate microbial ecosystems found within coral reefs, conveying a sense of the hidden scientific potential within these fragile marine environments.Beneath the waves, a hidden universe of microbial diversity holds the key to unlocking new biomedical and industrial breakthroughs.Santa Barbara Today

Researchers have discovered a treasure trove of previously unknown bioactive metabolites - small biomolecules with potential for new drugs, industrial products, and more - in coral reef ecosystems. A two-year expedition to the Pacific's coral reefs found over 13,000 new microbial genomes, with 90% of the bacteria being completely novel discoveries. The researchers say this underscores the importance of conserving coral reefs as vital reservoirs of molecular diversity before they are lost to climate change.

Why it matters

Coral reefs are home to a vast array of undiscovered microbes that produce a wide range of bioactive compounds. These compounds could provide the basis for new medicines, industrial materials, and other valuable products. However, coral reefs worldwide are under threat from climate change, making it urgent to study and preserve these fragile ecosystems before they are lost.

The details

The research team, led by UC Santa Barbara marine biologist Rebecca Vega Thurber, participated in the 2016-2018 Tara Pacific expedition, a two-year scientific voyage that studied 32 Pacific coral reef archipelagos and collected 58,000 samples. By taking a genomic approach to examine the bacteria associated with different coral species, the researchers were able to reconstruct over 13,000 new microbial genomes. Remarkably, 90% of these bacteria had never been discovered before. The newly found microbes were highly specific to their coral hosts and not found in the surrounding waters. The researchers say this trove of undiscovered bacteria and the bioactive molecules they produce could have immense value for developing new drugs, industrial products, and other applications.

  • The Tara Pacific expedition took place from 2016 to 2018.
  • The research findings were published in the journal Nature in April 2026.

The players

Rebecca Vega Thurber

A marine biologist at UC Santa Barbara and the director of the university's Marine Science Institute. She was a lead scientist on the Tara Pacific expedition and co-author of the Nature paper.

Tara Pacific Expedition

A two-year scientific voyage that studied 32 Pacific coral reef archipelagos and collected 58,000 samples to characterize the biodiversity and microbiomes of these fragile ecosystems.

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What they’re saying

“There's a huge treasure trove of genomic potential.”

— Rebecca Vega Thurber, Marine biologist, UC Santa Barbara

“Ninety percent of what we found had never been found before. That's a total of 3,700 new bacteria we discovered through this approach.”

— Rebecca Vega Thurber, Marine biologist, UC Santa Barbara

What’s next

The researchers plan to continue studying the newly discovered coral-associated bacteria to further characterize their bioactive potential and explore ways to harness these molecules for medical, industrial, and other applications.

The takeaway

This research highlights the immense untapped potential of coral reef ecosystems, which are home to a vast diversity of undiscovered microbes that could yield valuable new compounds. However, the fragility of these ecosystems underscores the urgent need to conserve coral reefs before they are lost to the impacts of climate change.