Alas, it's not just on a plane. Apart from these wild BC shrimps shipped in oxygen balloons, which are not that good either but expensive, you won't find prawns in Canada that aren't farmed somewhere. And have very little taste. I won't touch prawns that contain sodium salts other than sea salt, such as sodium metabisulfite. There are some Sea Mamma that don't have sodium metabisulfite and are borderline edible at T & T, and some at Costco. Not that either have much flavor. (Just back from an Italian island where they still have the real, sea-caught thing. One of which made me sick, but that's another story...)