Even in the early 1900s, as far as I can tell people living in North Dakota would likely not have been unfamiliar with interesting seafood (or at least had neighbors who were).
https://en.m.wikipedia.org/wiki/Swedish_emigration_to_the_Un...
https://en.m.wikipedia.org/wiki/Swedish_emigration_to_the_Un...
I don't think you can even call it seafood.
Surströmming beats lutefisk for that title.
[1] https://en.wikipedia.org/wiki/Fesikh and pronounced like this "Fisíj" borrowing from Spanish