I have a bunch... I've heard stories about them eating zoas and such, but they've never been a problem for me.
I'm curious Red, what do these guys eat that can have a benefit? I'm guessing they're just detritivores...
They eat detritus, algae and biofilm as well as coraline. Never really had an issue with them either and I think my urchin munches them sometimes. He wants all the coraline to himself
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20 Gallon SPS reef
29 Gallon FW "fat catfish" tank
20 Gallon Long Dart Frogs "Zig" and "Zag"