This urchin (Histocidaris nuttingi) uses its long spines for defense and for moving along the seafloor. The small hooks on the spines are used for manipulating food.
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, 1.3 MB).
This urchin (Histocidaris nuttingi) uses its long spines for defense and for moving along the seafloor. The small hooks on the spines are used for manipulating food.
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