Breaking down my over stock tank. I have had two black crabs living together in this tank for a couple of years and don't want them in my main tank so have to find them a new home. I think they are Mithrax crabs by the look of them. Hard to get a decent photo. They came in with some corals when they were really small. Now their back shells are about 1-1/2" maybe as much as 1 3/4" or so across.
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