A single cooking rule cannot govern every variety of salmon. Fat content dictates heat tolerance, and species vary significantly in their lipid profiles.
Farmed Atlantic salmon fat content averages between 12% and 15% by weight. This rich intramuscular fat insulates the meat, providing a generous margin for error. Even when taken slightly past 130°F, farmed Atlantic fillets stay relatively juicy because melting lipids lubricate the muscle fibers.
Wild species require a much lighter touch. Wild Alaskan sockeye temperature must be monitored vigilantly because sockeye, coho, and pink salmon are lean, muscular fish built for endurance swimming. Sockeye contains roughly 5% to 7% fat. Cook a sockeye fillet to 140°F, and its lean protein strands knot into dense, parched flakes. Wild salmon performs best pulled from heat at 118°F to 122°F, relying on ambient warmth to ease the center toward an unctuous medium-rare.
| Variety | Average Fat Profile | Pull Temperature (Off Heat) | Resting Peak Target |
|---|---|---|---|
| Wild Sockeye / Coho | Low, Moderate (4%, 7%) | 118°F, 122°F | 125°F (Medium-Rare) |
| Farmed Atlantic | High (12%, 16%) | 125°F, 128°F | 132°F, 135°F (Medium) |
| Wild King (Chinook) | Very High (11%, 14%) | 122°F, 125°F | 130°F (Medium-Rare to Medium) |
| USDA Standard Target | Any | 140°F, 142°F | 145°F (Well-Done) |
