Low profile black urchin

[OldRed1]

This small urchin, a little larger than a quarter in diameter, came as a hitchhiker attached to live rock from the Gulf of Mexico. I wish I could get a better photo, but it’s perched upside down on a rock I can see only from this angle. Could it be some form of pencil urchin?

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[KQuillan]

I found one in my rock the other day too.

 

[OldRed1]

Any luck on an ID? I have struck out so far!

 

[KQuillan]

Any luck on an ID? I have struck out so far!

Black rock boring urchin

 

[OldRed1]

Black rock boring urchin

Thank you!

 

[Baronen]

I have one too from gulf rock. It’s like tripled in size in two months

 

[BetterJake]

That is super cool! Urchins are my favorite inverts!

 

[sfin52]

Best is these guys are least likely to grab frags