Two years ago we invested in a sealer just to freeze some saltwater fish. We ate the last bunch a month or so ago and they were just as good as when they were fresh. These were large fish-tuna, swordfish and grouper. We did another bunch with some smaller speckled trout and they were also just as good as freezing them in water but after about 10 months, they were not as good. We also did this with shrimp and they were great up until the last bag as well. I think it is well worth it to invest in a vacuum sealer.