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NOAA Photo Library Image - expl5534

Cidaroid urchin with serrated arms that look somewhat like edge of steak knife. Wonder if these would cut someone handling them? Note that what appear to be younger, perhaps regenerated spines are smooth on edges.

Image ID: expl5534, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photo Date: 2010 July 28
Credit: NOAA Okeanos Explorer Program, INDEX-SATAL 2010

High Resolution Photo Available

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June 10, 2016