Hey, 55GalGill, I have the same exact sea urchin. My lfs told me it was reef safe also and they didn't know what kind it was. We started to call it Boo because of its Halloween colors, my husband wanted to call it Furby, but after it knocked over my sun polyps, I've been calling it Bulldozer! What else has yours been doing to your tank? Mine cruises around like he's trying to win a race or something.