ID this urchin

[lotus02]

Got this guy as a hitch hiker a while ago been living in my sump.

First time posting a pic ,I hope it works.

 

[rssjsb]

I don't know what it is, but it's gorgeous!

 

[lotus02]

Thanks ,that's why I kept it. When I got it several months ago it's body was no bigger than a dime.

 

[Steveabg]

Is this it?

http://www.poppe-images.com/images/image_info.php?picid=939805

Species
Prionocidaris baculosa

 

[lotus02]

Cool thanks for the link.