Underwater view of a sandy ocean floor covered with rounded stones or coral formations, transitioning from deep blue to turquoise.
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Polymetallic Nodule Field
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 cruise, at the flank of "B1 Seamount."
Credit

NOAA Ocean Exploration, 2026 Cook Islands ROV Exploration.