Gorilla Crabs?

[BoneSnapper]

Is there any way to tell if you have them in your tank. Something ate my Mushrooms. It wasn't my fish, and I can't seem to find any signs of one when I turn the lights off. I have tries two nights in a row, and still nothing.

 

[SkiFletch]

gorilla crabs don't often eat mushrooms. Fireworms can though... Where'd you get your LR from?