Green Mithrax v. Ruby Mithrax

[Fishheaven123]

Other than the color, is there any difference between the two? Is one more aggressive than the other? Would one be more beneficial than the other? Any input would be appreciated.

 

[melosu58]

Mithrax crabs come in several colors. They are not confined to just green. I personally have seen them white, black and green. I have heard others say they have seen them red. Liveaquaria says they are green but I have seen different.