I finally got rid of my hatpin urchin (maybe 12" diametre). Not only was he carving up my acrylic tank, but he would occassionally mow a channel through an SPS. I'm not sure it was purposeful, the SPS just gets in the way as he moves across a rock.
It was coraline algae that my hatpin ate. One day a rock would be pink, then next day... barren rock.
__________________
400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
|