Histocidaris nuttingi sea urchin eating a bamboo coral. Besides this predatory behavior, we also saw another species of sea urchin (Cidaris rugosa) feeding on  a crinoid during this dive.
Urchin
Image courtesy of the NOAA Office of Ocean Exploration and Research, Exploring Deep-sea Habitats off Puerto Rico and the U.S. Virgin Islands. Download larger version (jpg, 1.4 MB).
Histocidaris nuttingi sea urchin eating a bamboo coral. Besides this predatory behavior, we also saw another species of sea urchin (Cidaris rugosa) feeding on a crinoid during this dive.
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