Thats kind of what I thought, Im sure they can live for quite a while cysted in the fish's gills dormant, but dried out im pretty sure they would be dead in hours(if not minutes), not days or months. Either way I suppose it wouldn't hurt to sanitize your net every now and again anyways in a light bleach solution , I know mine could probably use it. I'm no expert so if anyone has evidence to the contrary I'm willing to listen.