OceanX Completes Landmark Timor-Leste Expedition, Delivering One of the Region’s Most Comprehensive Marine Surveys

The Prime Minister of the Democratic Republic of Timor-Leste, His Excellency Kay Rala Xanana Gusmão, said "The Government of Timor-Leste was pleased to partner with OceanX on this historic expedition in our waters. The research has revealed the extraordinary richness of our marine biodiversity and provided some of the most valuable and comprehensive scientific data our country has ever had, covering coral reefs, deep-sea ecosystems and the annual blue whale migration. These findings give us a strong foundation for future conservation, including the establishment of a national park around Atauro Island."

Vincent Pieribone, Co-CEO and Chief Scientist of OceanX, said the mission marked a major step in understanding the Timor Passage. "This region holds an exceptional range of species and habitats, and our teams were able to document it with a depth and breadth that has rarely been possible in these waters. The volume of information collected across deep, midwater, and coastal environments will support research for years to come."

Building a New Baseline for Timor-Leste's Ocean Science

Over fourteen operational days, researchers mapped close to five thousand square kilometers of seabed and recorded more than one hundred hours of sustained ROV and submersible activity. These dives generated extensive samples and imagery from steep slopes, midwater zones, and deep benthic habitats that have remained largely unexplored.

The expedition also delivered a detailed view of the seasonal blue whale migration. Helicopter teams, drones, and small vessels enabled sixty blue whale sightings and nearly fifty individual encounters, which produced a strong set of genetic and microbiome samples. These records will strengthen ongoing work to understand whale health and the impact of cookie-cutter shark interactions along the migration corridor north of Dili.

Andrew Craig, the mission lead for OceanX, highlighted the coordinated effort required to achieve this. "Every part of the ship contributed to this result. Deep-sea systems, mapping crews, aerial teams, and whale researchers worked in constant collaboration. The scale of the dataset reflects the commitment of the team and the strong support we received in Timor-Leste."

A Comprehensive Biodiversity Record

The mission's bioblitz program added substantial depth to the scientific output. Scientists collected more than four thousand biological samples, including corals, invertebrates, and cryptic species from reef, mesophotic, and bathyal environments. Early assessments indicate representation from roughly two thousand species. These findings reinforce the global significance of the Timor Passage and strengthen the scientific foundation for long-term monitoring.

High-resolution bathymetry gathered during the mission will contribute to global mapping initiatives and help fill major knowledge gaps in the region's seafloor structure. These datasets, combined with biological and megafauna records, will support collaborative research and advance efforts to understand ecosystem connections across the Indo-Pacific.

Towards Long-Term Impact

The Timor-Leste expedition delivers a major contribution to regional marine science. The data collected will support biodiversity assessments, whale ecology research, and the development of long-term baselines for the Atauro Marine Protected Area. It also strengthens OceanX's collaboration with Timorese institutions, creating new opportunities for research, education, and capacity building.

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About OceanX

OceanX is a nonprofit working to unlock the ocean's sustainable potential. Through a dual focus on science and education, we're building a new paradigm where humanity and the ocean mutually thrive. Our approach is fueled by exploration, leveraging advanced research, multimedia educational programs, cross-sector partnerships, and advanced technology to help transform how people understand and value the ocean. Our work strives to fortify biodiversity and increase the sustainable use of ocean resources to help ensure the ocean remains a foundation for human wellbeing and potential. OceanX is a nonprofit operating program of Dalio Philanthropies. For more information, visit www.oceanx.org and follow OceanX on Facebook, Instagram, X (formerly Twitter), TikTok, LinkedIn, and YouTube.