Any good ID sites for crabs

[Roxanne]

As I am sitting examining my tank a few minutes ago, I have noticed that there's a new crab in my tank....  I have never seen this little guy and unfortunately my camera is still in repair.  His front legs and head are black and hind legs are velvety white (I think...).  Any sites that I can look into to try and identify whether he's good or bad?

[Roxanne]

Surfing the net and it looks like a black mithrax...  Are they good or bad, seem to have mixed reviews on the internet.

[Darth]

as far as i know if they look hairy and or their pinchers are pointed they will attack everything and when in doubt take it out

[Roxanne]

how the heck to you get them out   As soon as I approach it goes directly in a crevice...

[HomerJ]

To catch one of mine, I used a small shotglass, and put a small piece of shrimp in it.  Lay it at an angle against a rock close to where the crab lives.  If you are lucky, the crab will get in there, but will not be able to climb out.

If you have a lot of hermits, they will also try to get in there, so it might not work the first time.

Good luck!

[Darth]

yeah I agree with homer you have to bait them with a glass, shrimp silversides work well