I have had my orange spotted snails for over 2 years now, and they come out of the sand almost everday when I feed mysis.  I have 7 in a 33 gal tank, had 8 and have only lost 1.  they don't constantly turn the sand like a goby, but they do turn little spots everytime they come out to eat. 
		
	
		
		
		
		
		
	
		
		
	
	
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