This M&S wild smoked haddock is kiln smoked using haddock responsibly sourced from the North Sea. Proudly Scottish. 100% of M&S Fish and Shellfish is responsibly sourced. High in protein. Protein contributes to the maintenance of muscle mass. There may be a natural variation in the size of individual fish pieces between packs. This product has been specially vacuum sealed to ensure freshness and eating quality. When the pack is opened you may notice a faint aroma naturally associated with this technology will quickly disappear.