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					Originally Posted by  jagermaier
					 
				 
				Sounds like it could be a Mithrax crab. Some say Mithrax are safe but I personally don't like or trust any crabs...    
			
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 Yup,  I think that you are the winner!!  Are Emerald crabs and Mithrax crabs the same then.  Do they change colour because I did have an Emerald but hadn't seen it in ages and thought it died.  This one is a different colour though.  Same crab maybe?