Salmon has become one of the most popular seafood choices in supermarkets thanks to its rich flavor and high nutritional value. However, many shoppers still struggle to tell whether the salmon they are buying is truly fresh or has been stored for too long.
According to experienced supermarket staff, there is a simple detail you can notice in just a few seconds that can help determine the quality of the salmon: the yellow fat lines on the fish fillet.
The “Golden Lines” That Reveal Salmon Quality
When salmon is cut into fillets and displayed on a cutting board or tray, you may notice thin yellow or golden lines of fat running between the layers of flesh.
These lines are actually natural fat deposits within the fish. If the salmon is fresh and of good quality, the fat will appear:
- Evenly distributed
- Bright yellow or golden
- Clearly separated between the muscle layers
These characteristics often indicate that the fish grew in healthy conditions and contains a balanced amount of fat, which helps give salmon its famous rich and buttery taste.

What If the Fat Lines Look Strange?
Experts say shoppers should be cautious if they notice unusual signs such as:
- Fat lines that look dull or grayish
- Uneven or excessively thick streaks
- Flesh that appears pale or watery
These signs may suggest the fish has been stored for too long or may not be of the best quality.
Another detail to watch for is the texture of the meat. Fresh salmon usually has firm flesh that springs back slightly when pressed, while older fish may feel soft or mushy.
Other Tips for Choosing Good Salmon
Besides checking the fat lines, experienced shoppers recommend paying attention to a few other indicators:

Color of the flesh:
Fresh salmon typically has a vibrant pink or orange color.
Surface moisture:
The fish should look slightly moist but not overly wet or slimy.
Smell:
Good salmon has a mild ocean-like scent, not a strong fishy odor.
A Quick Trick That Can Save Your Money
Salmon can be expensive, so choosing the right piece is important. By simply glancing at the golden fat lines on the fillet, shoppers can quickly identify better-quality salmon in just a few seconds.
Sometimes, a tiny detail on the cutting board is all it takes to pick the freshest fish at the supermarket.