Fish

Thunnus thynnus

S tier

Thunnus thynnus is the Atlantic bluefin tuna—the largest true tuna and the benchmark for high-fat belly and deep red loin in Mediterranean and Japanese luxury cookery. Wild stocks are strictly managed; flesh is dense, meaty, and graded by fat for sashimi, searing, and traditional preserves. Treat as a steak fish: sear hot and leave rare centres on quality loins, or confit belly. Never overcook—bluefin’s value is texture and fat, not well-done flakes. Traceability and legal catch documentation matter as much as the cut.