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					Originally Posted by Delphinus
					
				 
				A vermetid snail wouldn't really "burrow" it will just attach itself and start growing its tube outwards. 
 
They did a LOT of damage to the corals in my tank and I no longer let them be when they show up next to a coral.) 
			
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 They did ALOT of damage to my acropora too, as it spun it's mucus-like web over it basically suffocating it.  I turkey basted it when I could but could not keep up with the web.  I ended up plugging up the holes with superglue and haven't looked back since.