Emerald Crabs

[aprillynd]

A while back I bought 2 emerald crabs and they have thrived in my bio cube. I looked in my tank today and found that the larger of the two has changed color to a dark black, its claws are huge and I can't figure out why? Is it a female or is it about to molt or is it the diet? Someone please advise.

[JustDavidP]

I've never seen them turn "dark black", but I'm wondering if it is about to molt.

Dave

[lReef lKeeper]

sounds like it to me. i have seen them in green, brown, and even red ... but never black.

[Psychojam]

No black that I've seen with mine. My current Emerald crab looks whitish.

[Seahorsedreams]

My emerald was black and HUGE after a few years. We killed him accidently when we moved the tank and .... umm... crushed him with a rock :-X

But he was black when we got him.