black urchin/ coral killer?

[randolph]

just got a black urchin and a couple of coral frags, green button i think. urchin was all over it but i don't see where he did it any harm. new lights on 55 going from 30 watts to 192 watts. just built new hood, now needs stain and poly
this IS a great hobby

 

[beau24]

black urchins are very shy creatures. they will not harm any coral bigger than it. they will usually just hide.