Quoted from Grayman_EM:I posted this on another thread. Sharks are in the Mississippi River! Bull sharks which can survive in fresh water have been spotted all the way up to Alton Illinois. Yes they are ones that will take a bite out of crime and you too!
They found one in Lake Pepin. Which apparently is a widening of the Mississippi not too far South of Minneapolis.
https://www.in-depthoutdoors.com/community/forums/topic/ftlgeneral_668033/