A sea urchin with long, white-tipped purple spines rests on a sandy seabed between two dark rocks.
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Urchin
This unique urchin was seen during Dive 02 of the 2026 American Samoa ROV + Mapping Exploration expedition, while exploring a mound on the northern flank of Tutuila Island.
Credit

NOAA Ocean Exploration, 2026 American Samoa ROV + Mapping Exploration