| we had a pincushion urchin in with our G. chiragra, and it was in there quite awhile. then one day, i was passing the tank and saw an urchin skeleton that had the top bashed off it.
the Diadema urchins are a LOT less "bashable", altho the peacock DID give it a couple of "move yer a$$" pops when it settled over the main entrance to his lair.
__________________
Greg | 
