PHOTOS: Tiny Tropical Island Yields a Wealth of Species

PHOTOS: Tiny Tropical Island Yields a Wealth of Species
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The thick, solid spines of a pencil sea urchin jut out like the writing instruments that lend this creature its name.

These nocturnal animals hide in coral reef cavities during the day and crawl out after dark to forage for food.

Found in the Pacific and Indian oceans, pencil urchins are popular in the aquarium trade because they fare well in captivity. Their sturdy spines are sometimes used for making mounts for jewelry.
—Photograph by David Lane, University of Brunei
 
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