Ah, the classic trick. You look at the package and see “Sell By: Friday.” You bought it on Sunday. “Great!” you think. “I have a whole week!” Wrong.
That date is for the grocery store, not your stomach. You usually only have one or two days after you bring it home, regardless of that fancy sticker. Think of it as a suggestion, not a hard deadline—a very, very optimistic suggestion.
how long can fresh salmon stay in the fridge? - Test Food Kitchen
Your fridge’s temperature matters, too. Is it actually at 40°F (4°C) or lower? Or is it a cozy 45°F? Because if it’s cozy, your salmon is basically living in a hot tub. Not ideal.