How to go about catching a crab?

[kwirky]

There's this crab that came in on my liverock long long ago, and now it's getting pretty big. Anyone have any suggestions on how to catch him? I know which end of the tank he usually keeps to. He's about 1" across at the body, and about 3" from leg tip to leg tip.

[sawman]

i know how it feels to have unwanted crabs ...mmmmmm in my tank that is ...lol....anyway the best way i found was to use a juice bottle,with fishing line wraped around it,i put some sinkable srimp pellets in it .then droped it to the bottom,leaning up agaisnt the rocks .on a slight angle so they couldn't get out .in tottal ive caught 8 of the little buggers ..hope this works as weel for oyu as it has for me ....

[trilinearmipmap]

I agree with the juice bottle advice, just leave it out each night, I found I could catch a crab about one out of every four tries.

[MikeP]

Hey Sean, I've never had to catch one yet but here is what I have read about catching a crab. Cut the top of a pop bottle out like you were going to use it as a funnel, invert it into the remaining portion of the bottle put some bait in there and set it up so he can get in. The other one I heard about is using a glass jar, prop it up on a rock (about 45 degrees) put some bait in and that should do it. He won't be able to climb up the glass. Hope that helps, let us know how you make out.

[surgeonfish]

I am not good with DIY and so bought an acrylic trap. It cost a few bucks but was well worth it. However, the pop bottle idea should work for catching crabs

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[untamed]

I caught 2 within 1 hour by simply leaning a regular glass up against the rock with some bait in the bottom. Glass works really well as it is too slippery for the crabs to escape, even if the glass is only on a very slight angle.