Crab Help!!!

And is there anyway to get it out with out having to rip apart my whole tank? any suggestions?

 

im trying to catch something in my tank right now also. lucky you can see it, i dont know what mine is.
if you can take out the rock with it on it, that would be the easiest way
you can also try putting some food rubberbanded to a rock inside a glass jar. then tilt the glass jar on a rock so he can climb in but cant get back out. (thats the method im trying right now)

i would take it back to the lfs. they might know what it is, and hey maybe you will even get some store credit out of it!!

 

get a big mantis or ship it to me! my O. japonicus would love to smash it! haha