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#5
01-18-2010, 02:24 AM
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It does look like an emerald crab sme people leave them in there tank and some do not. In geral crabs are a bad thing in a reef tank but some are ok I have a freind that has an emerald crab that is about 3-4 inches across and jst kind of hangs out in his spot does not move away from that one spot much at any time. at least emerald crabs eat algae.
Bill 
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