I'm from Poland (in case there is no such thing in other countries) and a few days ago I bought a quark cheese mixed with salmon and some herbs, produced by some German milk factory for one of local big malls network.
When I looked at factory-printed "best before" information, I was shocked. Though actual "best before" date was fine (still a few days left), there was a clearly printed notice that fishing period for salmon fish used for preparation of this quark was in... June-August, 2012.
If this isn't a printer mistake (and there should be a June-August 2014), then what? Can we really safely store (deep freeze?) fish for two or more years? Is it still usable for food preparation processes? And -- finally -- what is the reason for doing so? Wouldn't it be easier and better just to use... a fresh fish?