Sohal Vs Black long spine urchin?

[asylumdown]

My sohal had a soft spot for very expensive and exotic sponges. Reduced a 7X3 inch bright blue sponge colony to confetti in 3 days.

I think sohals have a taste for things that other tangs might not find palatble in general.

I was lucky in that once my sohal was removed I had literally hundreds of small colonies of that blue sponge start growing on all my rocks from the bits that got scraped off - but you're not going to be so lucky with that urchin.