Quote:
Originally Posted by toytech
i would say xanthidea crab as well , same familly as emerald crabs . I had some big black ones that where harmless .The spoon shapped pincered crabs are usualy ok.
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Not trying to cause any problems here. But be aware emerald crabs are in the Majidae family, not Xanthidae. I would also suspect the big black emerald crabs you have are likely Chlorodiella nigra instead. Here is a video on youtube so you can compare.
http://www.youtube.com/watch?v=U5Hg2fwAy5Y