I've had many of the items mentioned above, however I guess I'd have to put "muktuk" (whale skin) & seal as the strangest/rarest item that I've ever tried.
We were at a "Wildgame Barbeque" here in Anchorage..I noticed that most folks had two large slices of bread on their plates.
I asked, "Why all the bread?"
Reply, "You ever try seal?"
Me, "Nope."
Reply, "You'd better get more bread!"
Man that was the fishiest tasting stuff...I was burping it up the rest of the day...Nope, don't need to try seal again! BTW, the muktuk wasn't much better!