NOAA Scientists and Partners to Map Deep Waters and Seabed in the Cook Islands

During the 2025 Deep-sea Habitats of the Cook Islands expedition on Exploration Vessel Nautilus the team surveyed various seascapes to better understand seabed environments, and natural and mineral resources in the region. In this image, polymetallic nodules rest on sediment accumulated in a depression between rounded pillows and extended lobate lava flows, which are evidence of ancient volcanoes.
During the 2025 Deep-sea Habitats of the Cook Islands expedition on Exploration Vessel Nautilus the team surveyed various seascapes to better understand seabed environments, and natural and mineral resources in the region. In this image, polymetallic nodules rest on sediment accumulated in a depression between rounded pillows and extended lobate lava flows, which are evidence of ancient volcanoes. (Image credit: Ocean Exploration Trust)
This summer, NOAA Ocean Exploration will conduct an expedition on NOAA Ship Okeanos Explorer to map, explore, and characterize deep waters off the coast of the Cook Islands. The effort is in partnership with the Cook Islands Seabed Minerals Authority.

Using remotely operated vehicles (ROVs), mapping technologies, and onsite sensors, the team will explore abyssal plains and the Manihiki Plateau. Operations will include imaging and sampling the seabed and water column to compare a variety of deep-ocean habitat types.

The 28-day expedition will take place in July and August 2026. While the expedition is underway, ROV operations will be streamed online in real time, enabling shore-based scientists and the public to watch live video from the deep sea and hear experts discuss what they see and learn.

Data gathered during the expedition will be made publicly available and shared with the Cook Islands government to support the management of marine resources in the region.

This work will build on a NOAA-funded 2025 expedition conducted in the Cook Islands on the Exploration Vessel Nautilus with the Cook Islands Seabed Minerals Authority and the Ocean Exploration Cooperative Institute.

“This expedition is a major step toward strengthening our strategic partnerships in the Pacific,” said Neil Jacobs, Ph.D., NOAA Administrator. “NOAA is proud to contribute our world-class science and research to understand deep-sea resources, which will directly contribute to the economic growth of the United States and our partners, and will set the standard for responsible critical mineral management across the globe.”

The mission’s focus is on scientific exploration and environmental data collection in areas known to contain polymetallic nodules, which often contain nickel, cobalt, manganese, and traces of additional critical minerals. NOAA’s partnership with the Cook Islands will allow a better understanding of the nation’s marine environment and inform the collection and development of marine critical minerals off the Cook Islands coast. This expedition advances the mission outlined in the Executive Order “Unleashing America’s Offshore Minerals and Resources,” which calls upon the United States to strengthen relationships with partners interested in responsibly developing seabed minerals in their national jurisdictions.

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