Should you eat the dark layer on bottom of salmon?

Yes, you can eat the dark layer on the bottom of salmon. It is perfectly safe to consume and in fact, is quite nutritious. This dark layer is called the belly flap or fat line, and it's actually one of the tastiest parts of salmon. This fat is rich in omega-3 fatty acids, which are essential for overall health. It also contains vitamin D, which is important for bone health, and astaxanthin, a carotenoid that is responsible for the pink color of salmon and has antioxidant properties. So it is recommended to leave it on when cooking!