Nice!
From last season, I seal-a-mealed all the prime loins of albacore and rossman canned all the end pieces. Ended up with 58 cans of albacore for the year. Just water salt and albacore.
I don't know if I'd can thresher or any shark. That urea/uric acid may not end up well in the can/jar. Try like tyler said and do some test jars w/ various ingredients. But don't ask me to guinea pig it. Ha.
Midwest? So what?