The Northern bluefin tuna belly in olive oil by Marino Martínez de Luco comes in a 280 g preserve format. The commercial description places it among the brand’s gourmet preserves and describes it as a gastronomic luxury. Its production is artisanal and the preparation is carried out by hand, two features expressly highlighted in the product information. The Northern bluefin tuna used is caught by rod and line in the Cantabrian Sea. This refers to the fishing area, without stating the country where the preserve is made. The product combines Northern bluefin tuna belly and olive oil, as reflected in the product name. The declared net content is 280 g. No drained weight or full ingredient list is provided. Specific storage conditions or nutritional information are also not detailed in the available data.