I just bought refrigerated salmon fillets from a supermarket. They are in the kind of packet you'd expect to be vacuum packed. I have bought fish here before and it's always vacuum packed.
This time, didn't notice in the shop, but I notice now (as soon as getting home, 10 mins), that the fish is "loose" within the packet. There is clearly no vacuum, even though the wrapping conforms to the shape of the fish it isn't really "sealed" (it's not skintight to the fish, the packet doesn't seem to have any holes or openings anywhere though). The fish can slosh around, there are air gaps.
Is it safe to eat?