A spiny, reddish-brown sea star with a central opening on dark sand.

Hymenaster Slime Star

Image courtesy of NOAA Ocean Exploration, 2025 Beyond the Blue. Download larger version (jpg, 1.41 MB).

This Hymenaster slime star, collected during Dive 13 of the Papahānaumokuākea ROV and Mapping expedition at a depth of 4,354 meters (14,285 feet), likely represents a previously undescribed species.