that looks like a pincushion urchin and yes, they will pick up anything loose. if it's a prized coral, it'll get dropped where you won't be able to reach it. if it's an aiptasia, it'll get dropped front and center! LOL
<a href="http://s6.photobucket.com/user/Ninapearl/media/TANK/10291857_796438777043354_232983905534652853_n_zps888f510a.jpg.html" target="_blank"><img src="http://i6.photobucket.com/albums/y203/Ninapearl/TANK/10291857_796438777043354_232983905534652853_n_zps888f510a.jpg" border="0" alt=" photo 10291857_796438777043354_232983905534652853_n_zps888f510a.jpg"/></a>