Is this what's killing my snails and hermit crabs?

tgurske

New member
I spotted this little guy tonight. No idea what it is or where it came from. Any idea what it is and if it could be what's killing my cleanup crew?
 

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Hard to tell from the pic, looks like it might be a gorilla crab. If so, it might harm snails but, likely IME won’t bother hermits.

Where did you source your live rock? With both hermits and snails dying, I suspect a mantis shrimp.
 
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