help with shell ID

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BUDMANOK

Contributor
Messages
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Location
Broken Arrow,Ok
# of dives
100 - 199
anyone know what shell this is? pic taken at bottom of swimthru at Eden Rock Grand Cayman

image.jpg
 
Sea urchin
 
It's a dead sea urchin. Spines are gone.
 
It's called a test.
 
D. All of the above are correct.

Now the real question: What species of urchin?
 
thanks had no idea what this was never saw a dead one before
 
Diadema antillarum?
 
https://www.shearwater.com/products/peregrine/

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