Rachel, I'm not sure they're the same. I maintained local species in a tank at Camosun when I worked for the biology department. They had been in there for years and I don't think food was ever thrown in. They just kept going. They also come from the shoreline which has a couple of contaminants here and there. This might make them tougher, and able to live in a captive environment. 
		
	
		
		
		
		
			
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				Brad
			 
		
		
		
		
	
		
		
	
	
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