[Clownfish]

They can and will knock stuff around, much like a turbo snail.
The urchin MAY eat some corals, like not-so-toxic softies. My black spine urchin ate an entire colony of Cespitularia.
Over $700 in coral, before I found who the perp was in my reef tank.

He is now in my sump. He also ate regular Pulsing Xenia, and some other softies, like Anthelia.

 

[Clownfish]

They can and will knock stuff around, much like a turbo snail.
The urchin MAY eat some corals, like not-so-toxic softies. My black spine urchin ate an entire colony of Cespitularia.
Over $700 in coral, before I found who the perp was in my reef tank.

He is now in my sump. He also ate regular Pulsing Xenia, and some other softies, like Anthelia.