A dense field of potential polymetallic nodules, each about the size of a tennis ball, seen during the beginning of Dive 06 of the 2026 Cook Islands ROV Exploration
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Nodules from Dive 06
Dive 06: A dense field of polymetallic nodules, each about the size of a tennis ball, seen at a depth of approximately 4,950 meters (3.1 miles) during Dive 06 of the 2026 Cook Islands ROV Exploration cruise, near the bottom of “B1 Seamount.”

From: Marine Critical Minerals in the Cook Islands: A Preliminary Look
Credit

NOAA Ocean Exploration, 2026 Cook Islands ROV Exploration