Has a bull shark ever been found in Lake Superior?

AP'S ASSESSMENT: False. Bull shark sightings have been confirmed in the Mississippi River as far north as Alton, Illinois, but reports of the sharks being found in the Great Lakes are either hearsay or hoaxes, multiple experts told The Associated Press.



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But Bull Sharks are able to recycle salt in their kidneys, maintaining salt levels critical to its survival. Yet even the Bull Shark would not be able to make its way into the Great Lakes watershed and survive! The water temperature in the Great Lakes is far too cold for most sharks (including the Bull Shark).

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Lake Nicaragua in Nicaragua Bull sharks travel up the San Juan River to Lake Nicaragua and sometimes spend years in the lake before returning to the Caribbean Ocean. Lake Nicaragua is a freshwater lake, and it's one of the largest in the Americas.

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But Heithaus said it would not be possible for a bull shark to reach the Great Lakes on their own because most don't travel very far upstream. If one did reach the lakes, it would not be able to survive due to the cold water temperature.

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Lake sturgeon are the largest fish in Michigan, and it's not even close. There is a tie for the second-largest fish ever caught in Michigan.

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There are no sharks in Lake Michigan. Most sharks require salt water and most freshwater sharks don't live anywhere near the Great Lakes. Periodically there are rumors of Bull sharks swimming up the Mississippi River and into the Illinois River to get to Lake Michigan, but this would be an unlikely journey.

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Lake Nicaragua is the only freshwater lake containing oceanic animal life, including sharks, swordfish, and tarpon. More than 40 rivers drain into the lake, the largest being the Tipitapa River.

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Alligators are rarely found in the Great Lakes. Although some alligators thrive in freshwater, it's just too cold in the north for them to survive. They don't typically live farther north than North Carolina. It's unclear how the alligator arrived to Lake Michigan.

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