Image: Diadem urchins

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Description: A bunch of diadem sea urchins : those with an orange circle are Diadema setosum, those with only blue patterns are Diadema savignyi.
Title: Diadem urchins
Credit: https://www.flickr.com/photos/q-phia/13570579603
Author: Q. Phia
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Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: https://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes

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Diadema setosum

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