Vaccume packed it will last at least a year in a good cold freezer. The trick is getting it to last that long. Do your self a favor and vaccume pack it and then put a few packs in the coldest part of your fridge. They will keep there for at least a month and tasts better if it's not frozen. I'v gotten so spoiled that I don't like it as much if it's been frozen. Sometimes you have no choice, but fresh is much better. Also get a sharpe (felt pen) and date stamp your bags also list species, etc. This helps when sorting the freezer bins.......
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You can always tell a fisherman, you just can't tell him much.