I've had a Shimano representative (on the "fishingmagic" website - primarily freshwater) advise me just that when I asked about using a baitrunner for fishing very close in , in salt water creeks.The specific reel I am referring to is the BAITRUNNER AERO GTE-B new model.
Described as a spinning reel.
The point was, allegedly, use in salt water invalidates the warranty. The dealer has just had one such case! :wacko: