Good or Bad crabs?

[d.grcich]

Found two crabs while moving my live rock. Question to keep or flush the little guys?

 

[Piper1]

top one looks like an emerald crab. I would keep him unless he starts nipping at your coral. I could be wrong, if he is more of a black color than a green, he is something else.

 

[fishysteve]

Why flush them when you could take them to your LFS.

 

[cateyes]

i've been told that, if their pinchers are pointed they are not good if their pinchers are blunt they are probably safe, algea grazers, either way, any crab found, that i did not put in the tank, is evicted, that is, if i can catch him...