Help with identification

Images: 
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nudi4.jpg

These two shots are blowups of a small portion of a photo of a coral outcropping. I took it in the Marine Preserve at Key Largo last month. I did not notice the two white organisms at the time and did not get a close up. Can someone help me with the identification?

Call me crazy but...

The white "organisms" in question look, to me, remarkably like a pair of shark teeth (point up) that some shark lost and they just happened to land there. A sand tiger I think. Anyone else has a guess?

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