Which rivers have sharks?

Unlike most sharks, bull sharks can survive in freshwater for long periods of time. They have even been found in the Mississippi and Amazon Rivers. They prefer shallow coastal water, which means they can often come into contact with humans.



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2,485 miles/ 4,000 km up The Amazon River. Bull sharks have even been seen 2,485 miles/ 4,000 km away from the ocean up the Amazon river. Bull sharks have been known to travel all the way from the Brazilian coast up river to Iquitos in Peru and into northern Bolivia.

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While there have been past “sightings,” most have turned out to be pranks or misidentifications. The reality is that the largest of the Great Lakes (Lake Superior and Michigan) are extremely deep lakes that are too cold for sharks.

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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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The World's Most Shark-Infested Beaches
  • New Smyrna Beach, Florida. West Coast Scapes/Shutterstock. ...
  • Makena Beach, Maui. Billy McDonald/Shutterstock. ...
  • Bolinas, California. cdrin/Shutterstock. ...
  • Lake Nicaragua, Nicaragua. ...
  • West End, Grand Bahamas. ...
  • Umhlanga Rocks, South Africa. ...
  • Coffin Bay, Australia. ...
  • Topsail Island, North Carolina.


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These are some of the lakes that sharks live in: Lake Nicaragua in Nicaragua. Carbrook Golf Club in Queensland, Australia. Lake Pontchartrain in Louisiana.

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There are no sharks in Lake Erie, pronounces Officer James Mylett of the Ohio Department of Natural Resources (ODNR).

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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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A 4-foot alligator was found in Lake Michigan this week, but experts say there should be no worries that the reptiles could take up permanent residence in the Great Lakes the way pythons have made a home in the Florida Everglades. Midwest winters are way too cold for gators.

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There was a shark found in Lake Michigan, but there has never been an attack. It was a real 29-inch shark not a fake, that two Coho fishermen pulled from the lake about two miles off the Milwaukee shore on April 25, 1969. The shark was dead, but for several days fishermen in the area were uneasy.

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Lake Nicaragua is one of the largest freshwater lakes in the Americas and bull sharks travel up the San Juan River and through a series of eight rapids in a similar manner to salmon to reach the lake, where they may stay for several years.

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Lake Nicaragua is the only freshwater lake containing oceanic animal life, including sharks, swordfish, and tarpon.

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Lake Michigan is generally clean and safe for swimming but it can become contaminated with harmful bacteria.

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