On March 19th to 21st 2025, representatives from the National Environment Service (NES) — Keanu Harawira and Ngatupuna Kae — took part in observing the ARTEX 2025-1 Expedition, the first of several deep-sea research missions planned for this year.
The expedition, led by the Seabed Minerals Authority (SBMA), focused on studying two large underwater mountains (called seamounts) located to the southeast of Rarotonga. These seamounts are believed to be volcanic in origin, and understanding them will help scientists learn more about the Cook Islands’ natural history and the environment beneath the ocean.
The research was carried out on the vessel Anuanua Moana, using advanced sonar technology to create detailed maps of the seafloor. These maps help researchers see the shape, size, and structure of the seamounts without having to dive underwater. This kind of work is important for gaining a clearer picture of our deep-sea environment and how it may connect to marine life in the area.
Ngatupuna Kae shared, “This expedition was a whole new perspective for me. It was my first time out at sea, and learning about the work done onboard was very inspiring and insightful.” Keanu Harawira also reflected on the experience, “Although I’ve been out at sea before, getting to observe the scientific operations gave me a better understanding of marine science and geology.”
This particular expedition builds on research first started in 2023 by scientist Matthew Jackson, when an underwater volcano was discovered in the same region. This underwater volcano was only discovered 60 Kilometres South East of Rarotonga during the time and they named it ‘Tama’. This recent expedition discovered the seamount named ‘Pepe’ which was discovered near Mangaia. The ARTEX 2025 mission continues this work, aiming to fill in gaps in knowledge about the seafloor around the Cook Islands.
By observing this expedition, NES staff gained valuable insights into how deep-sea research is carried out and how it can support better decisions about managing our ocean space. The mission also shows the importance of Cook Islanders being involved in scientific research and protecting our natural environment for generations.
