Been vacuum sealing my fish for 5+ hrs now.Used to seal in water in zip lock bag.Advantage is you save space and thaw faster.Think both ways,fish lasts a year or longer.I use a 12" GameSaver FoodSaver.Couple of tips I have learned a long the way.
I double seal both ends of a 8" tube I use.Initially the seal would fail once in a while,but not if double sealed.Dampen the foam area of upper and lower oval shape section that creates the suction.That helps pulling air out.
I zipper all my filets.After that I cut the upper dorsal and lower belly area in sections and stack them in sink by type.I then figure out how many bags I need based on amount of filets I have.I put around 1.25lbs per bag.I cut the tube bags 8.5" long and place the pieces in bag so no space left between pieces.Dorsal meat first,then belly meat,and last tail sections.If dorsal meat too thick,will cut that section in half to no thicker than 3/4".
We then get it fried up at Jolly Rogers or cooked up at Crow's Nest.Blackened at Crow's Nest is awesome.