last week i pulled out some frozen smoked vacuum packed salmon , put it in microwave for a few minutes to defrost. well i got side tracked and opened the microwave a day later and lo and behold there is that fish , i know most of you are probably saying it must not be too good if i forgot about it. well i threw it back in the fridge and im just wondering if its still good [still sealed] or should i throw it out? because im having family over for x-mas eve and i wouldnt want to feed them bad fish. thanks in advanced and merry christmas.