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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Two Coho fishermen pulled a 29-inch shark from Lake Michigan 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.
There have been no confirmed sightings of bull sharks in the Great Lakes region. While bull sharks are known to inhabit freshwater bodies, they are primarily found in warm, coastal waters and estuaries.
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.
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.
The most dangerous predator in the Great Lakes is the sea lamprey, which was actually introduced as an invasive species. Primarily, it goes after a sports fish called the lake trout, often wounding them as they kill them off. It is also attracted to the blood and bodily fluids of any creature.
No shark reports have been scientifically documented in the lake. The Illinois River has seen at least one documented case. Dams now keep any wandering sharks from entering the river.
Lake MichiganThe Great Lakes are all water bodies that swimmers should think twice about entering. Lake Michigan in particular is the roughest of the Great Lakes, and poses a major risk to those thinking of taking a dip. This body of water is often named the most dangerous lake in the United States.
Lake Superior is safe for swimming. In fact, it has the lowest drowning rate of all the Great Lakes, as reflected in the statistics provided by the Great Lakes Surf Rescue Project. There were 108 confirmed drownings in the Great Lakes in 2022, along with 12 unknown final outcomes.
New Smyrna Beach, FloridaNew Smyrna is known as one of the foremost the shark attack capitals of the world. Be careful when surfing out in the Atlantic. Common sharks to see in New Smyrna beach include blacktip, spinner, and tiger sharks.
Haole Girl — 20 Feet LongShe was first sighted off Oahu's coastline in January 2019. The footage shows a 20-foot shark, eight feet wide, which was named Haole Girl.