Do mushrooms "defecate"?

[cobray]

I notice that around some of my mushrooms there is usually an accumulation of a fine powdery/silty substance. My first thought is that it is just detritus, but it seems to build up just around the mushrooms. Are they known to excrete anything?

[pyron88]

Haven't seen it around mine. Picture would be good.

[hng]

Doubt it's the shrooms. Maybe a spaghetti worm or something else in the rock.

[leveldrummer]

i get the same collection around shrooms and other corals, i think its lack of flow, especially as some of these open pretty large and can slow flow behind them pretty good. try to pop it away with a turkey baster.

[Wiskey]

Musrooms do poo, but likely the stuff around your mushrooms is detritus built up due to lack of flow around and under the mushrooms themselfs.

Whiskey