good crab or bad crab?

jcraft

New member
Found this lil guy in one of my new acros . . . just wondering if he should stay
acrocrab007.jpg

acrocrab005.jpg
 
Bad crab.

You can tell by looking at the claws. Those claws are made for cutting. Compare them to the claws of a Mithrax and you will see what I mean.
 
I have one of those on a frag that I picked up, the crab just showed up one day. Why are they bad vs. the others that you reguarly see on corals.
 
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