Expedition charts Cook Islands seafloor, amid scrutiny over mining motives

Expedition Charts Seafloor of Cook Islands Amid Mining Concerns

Thousands of meters beneath the ocean’s surface, a remotely operated vehicle's camera filmed a ghostly white creature gliding over a seabed covered with polymetallic nodules — mineral-rich formations resembling blackened potatoes. The creature’s orchid-shaped fins undulated gracefully as it moved, its slender tentacles trailing behind.

This mysterious animal was identified as a bigfin squid (genus Magnapinna), a rarely seen organism with fewer than two dozen confirmed sightings and no physical specimens ever captured.

Scientific Significance and Public Engagement

Adam Soule, a geologist and oceanographer directing the U.S.-based Ocean Exploration Cooperative Institute, which leads the expedition aboard the E/V Nautilus, expressed enthusiasm about the rare sighting. The expedition is funded through a 10-year, $200 million grant from the U.S. National Oceanic and Atmospheric Administration (NOAA).

“One of the cool things about the Nautilus is that there’s a lot of people following online, watching in real time and sending in comments,” Soule told Mongabay.

Mission Context

About the Bigfin Squid

The bigfin squid’s elusive nature and unique appearance make it a subject of fascination and mystery within marine biology.

Its discovery during the expedition highlights the ocean’s vast unexplored biodiversity and challenges in deep-sea research.

“This otherworldly creature was a bigfin squid (genus Magnapinna), an organism that scientists have spotted fewer than two dozen times, and one that has never been physically captured.”

Author’s summary: The rare sighting of a bigfin squid amid the Cook Islands seafloor expedition underscores the ocean’s unexplored mysteries and raises awareness about deep-sea mining impacts.

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Mongabay Mongabay — 2025-11-07