A tethered remotely operated vehicle uses bright lights to illuminate a dark, rocky ocean floor.
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ROV Deep Discoverer
Remotely operated vehicle Deep Discoverer traverses the seafloor of the mound explored during Dive 02 of the 2026 American Samoa ROV + Mapping Exploration expedition. Throughout the dive, the seafloor substrate was sedimented with volcanic rock outcrops.
Credit

NOAA Ocean Exploration, 2026 American Samoa ROV + Mapping Exploration