Pink sea urchin with radiating spines on a dark rock surface.
Urchin
Image courtesy of NOAA Ocean Exploration, 2025 Beyond the Blue. Download larger version (jpg, 1.41 MB).
An urchin observed on the seafloor at a depth of 1,790 meters (5,873 feet) during the first dive of the Papahānaumokuākea ROV and Mapping expedition.