they look to me like aptaisia. GET RID OF THEM FAST!!! they can cause a huge problem in a tank, i you need methods to get rid of them, just say so, 
		
	
		
		
		
		
			
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				120 Gallon Reef With 2 overflows and 35 Gallon Sump. Mag 18 on the Return. Lit by Aqua Light Pro Deluxe. Super Reef Octopus 2000 Skimmer. 81 # LR 
28 Gallon Top Down Display Mixed Reef. Radios Pro With TIR Lens Kit
			 
		
		
		
		
	
		
		
	
	
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