If you have a good fish market nearby consider stopping in and asking them to seal it for you. I live near Fishermen's Terminal and the folks at the little fresh fish market there seal mine for something like .10 a pound. Never had a problem with the bags or seals. They sell a lot of fish to tourists who need to ship it so they've got all the hardware to take care of me.

At first they were taken back by someone bringing fish into the market but now they get a kick out of it. You should have seen them oogling the sockeye I brought in yesterday...

Bruce