Can someone ID this urchin

Calappidae

Harlequin Shrimp
It's actually an Echinometra lucunter, a species of rock urchin.

They are not poisonous, nor are they venomous. Firmly grasping this species shouldn't puncture any skin.
 
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Betta132

New member
I found a couple of similar-looking species in Hawaii, with exactly that sort of spine. They feel like hairbrushes, they aren't sharp.
 

Calappidae

Harlequin Shrimp
Nah, these species are very reef safe. Their spines are too frail to push rock. (they'll snap off first)
 
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