A yellow stain on salmon after a week in the refrigerator is usually a sign of spoilage or oxidation, and it’s not safe to eat. Here’s what could be happening:
1. Oxidation
- Fish naturally contains fats that can oxidize over time, changing color.
- Fresh salmon is typically pink to reddish-orange; yellowing can indicate the fat is breaking down, which affects flavor and safety.
2. Bacterial Growth
- Salmon stored in the fridge for a week may have started bacterial decomposition, especially if it was not tightly sealed.
- Bacteria can produce discoloration, slime, or off smells.
3. Other Indicators of Spoiled Salmon
- Smell: A strong fishy, sour, or ammonia-like odor.
- Texture: Slimy, sticky, or mushy flesh.
- Color: Dull, grayish, or yellow spots instead of bright pink/red.
⚠️ Important Safety Note
- Do not eat salmon with yellow stains or off smells.
- Eating spoiled fish can cause food poisoning, with symptoms like nausea, vomiting, diarrhea, and stomach cramps.
- Even cooking the fish thoroughly does not always remove toxins produced by bacteria.
How to Store Salmon Properly
- Keep in the coldest part of the fridge (around 32–38°F / 0–3°C).
- Use within 1–2 days of purchase for optimal freshness.
- Freeze if keeping longer than 2 days; properly wrapped, salmon lasts 2–3 months in the freezer.
💡 Bottom line: A yellow stain is a warning sign. It’s safest to discard the salmon and not risk foodborne illness.
If you want, I can give tips on how to tell fresh salmon from spoiled salmon at the store so this doesn’t happen again. Do you want me to do that?
