Are There Sharks in the Great Lakes?

It is possible for sharks to be in the Great Lakes, particularly bull sharks, which are known for their ability to survive in freshwater for up to 18 years. Although there have been no confirmed sightings of living sharks within the Great Lakes in recent years, there have been several dead sharks discovered along the shore; whether these are the result of elaborate pranks by fishermen or evidence of shark-based activity within the Great Lakes is up to debate.

One of the most intriguing developments in this phenomenon is the Great Lakes Freshwater Shark Search Project, a grassroots research movement spearheaded by explorer and TikToker Jordan Adrift. Combining citizen science with viral content, Adrift has garnered a following of amateur researchers, divers, and curious locals determined to explore what might be lurking beneath the surface.

The project’s goals include:

• Investigating past shark sightings or remains found in and around the Great Lakes

• Promoting underwater exploration using sonar and drone technology

• Encouraging the public to report unusual findings or footage

• Raising awareness of freshwater ecosystems and their biodiversity

  
  

While mainstream science continues to treat the idea with skepticism, the project has struck a chord with many, offering a blend of adventure, mystery, and social media storytelling.

Unlike most sharks, bull sharks are uniquely adapted to survive in both saltwater and freshwater environments. In fact, they’ve been found in rivers and lakes as far inland as Illinois, and scientists have recorded them surviving in freshwater for up to 18 years.

This physiological adaptability is due to their ability to regulate the salt levels in their bodies, allowing them to move between ocean and river systems with relative ease. While no verified, living bull shark has been documented in any of the Great Lakes, their biological capabilities make it technically possible.

Great Lakes Freshwater Shark Search Project Mug

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