A robotic arm holds a dark, rough rock over a sandy seabed scattered with similar rocks.
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Rock Sample Collection
The manipulator arm of remotely operated vehicle Deep Discoverer is used to collect a volcanic rock sample during Dive 02 of the 2026 American Samoa ROV + Mapping Exploration expedition. This was one of three rock samples collected during the dive.
Credit

NOAA Ocean Exploration, 2026 American Samoa ROV + Mapping Exploration