What kind of urchin is this?

[NL146]

My tank was up for about two years, then I moved and set it up back 3 months ago. I saw this guy about a month ago while checking out the tank at night. It was about half inch in diameter. Does anybody have any info on it?

 

[MIKE NY]

looks like a pencil urchin...here's some info
http://www.liveaquaria.com/product/prod_display.cfm?c=497+530+592&pcatid=592

 

[NL146]

looks like a pencil urchin...here's some info
http://www.liveaquaria.com/product/prod_display.cfm?c=497+530+592&pcatid=592

Thanks, that looks like the closest resemblance.