The Smoked Salmon in the gold foil pouch has a shelf life of at least four years, as long as it is not opened, punctured or leaking. Even beyond four years, the product will likely be good to eat.
Always handle Dry Ice with care and wear protective cloth or leather gloves whenever touching it. An oven mitt or towel will also work. If touched briefly it is harmless, but prolonged contact with the skin will freeze cells and cause injury similar to a burn. Unwrap and leave …
Salmon is not known as a high-risk fish for Mercury like the larger predator fish, but there have been some instances of Salmon having higher levels of Mercury. The risk is usually from population and pollution in the lakes and rivers where the salmon begin their lives.