Does it move around the tank???? 
 
Does it kinda look like a snail with no shell.... 
 
If so then I think they are stomatella(sp?) 
 
They are good for your tank.....I have about 15 of them now!!!! 
		
	
		
		
		
		
			
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				500G Mixed Reef
   
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Electrician, Electronics Technician, I can help with any electrical questions you might have!! 
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Kevin
			  
		
		
		
		
	
		
		
	
	
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