Yes, defrosting vacuum sealed fish _in the fridge_ is safe, also in the package, for the next day as well, but not beyond. Defrosting on the countertop (or on

Yes, defrosting vacuum sealed fish _in the fridge_ is safe, also in the package, for the next day as well, but not beyond. Defrosting on the countertop (or on the heating) is not, for the reasons GP stated.