The water is simply too cold to support sharks, even the bull shark cannot survive for long.
To the best of my knowledge, there are currently no sharks in the Great Lakes. In theory, some species of sharks, such as the bull shark, could thrive in the Great Lakes, but their introduction is unlikely with the series of locks and dams in place. Bull sharks can make it all the way up to the great lakes but they are only looking for food and there currently is an abundance of Asian carp which should keep them in the rivers. However, the Great Lakes are very cold and it is unlikely that Bull sharks can survive in there for too long, in addition to them not bring truly a freshwater shark species.
NONE, there have been no sharks in any of the great lakes. That's because there has to be a river attached to an ocean, and there are no salt water rivers attached to the great lakes. But Bull sharks have been known to go into fresh water to have their babies so watch out if you are in the Mississippi River because they have been found there, and they are the MOST dangerouse shark in the world!
yes yes
There have been some reports of bull sharks making it as far as lake Michigan but these are believed to be hoaxes. Some sharks like the bull can endure fresh water but not for the long periods needed to make it to lake Erie and Michigan. As a diver with over 600 hours in all the great lakes I have yet to see or hear of any evidence to corroborate any of these stories.
If you mean the Great Lakes, then no.
None. There are no parts of any great lakes in Colorado.
None of the Great Lakes touch any of the Great Plains States.
NO
No
probebly
none of the great lakes are man made all of them were made from nature
The Great Lakes are open to the ocean through the Gulf Of St. Lawrence and St. Lawrence River. The St. Lawrence River also has a very powerful current. Theoretically a shark could get into Lake Michigan through canals from the Mississippi or the ballast water from ocean going ships, but given the lakes low temperature all year round I doubt they would survive very long. The Amazon River is a natural habitat for bull sharks and is directly open to them whereas the Great Lakes are both cold and difficult to enter. The restricted access and environment would mandate a compelling reason for bull sharks to migrate to the lakes and there really isn't any. Additionally, no bull sharks have been spotted in the Saint Lawrence. Any bull shark that could enter the Great Lakes would die before reaching Lake Ontario.