Hitchhiker In Live Rock

[djcanis]

I have a rather pourous 20 lbs chunk of LR, today, inside I saw what I think is a crab, but nothing I put in the tank. It was tan and black, kind of furry looking like a spider, with sharp gold nails on the end of its legs. It was rather large, about the size of a half dollar from what I could see. Didn't see any claws or head structure though. Any ideas? What should I do?

 

[airforceb2]

Take a picture if you can. It will be a lot easier to ID it if you can.

 

[djcanis]

That probably not possible, it's deep in the rock and I need a flashlight to see it. I'm tempted to break the rock in half. I doesn't look all that friendly. I left some empty shells all around the LR hoping it will take to 1 of them, but I'm doubting it.

 

[bigarn]

When in doubt, take it out ... it doesn't sound harmless to me. Put some meaty food near the rock and if it comes out to get it, get him!