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.
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!
the food web of the wish in the great lakes is small plankton<shrimp<sardines<shark<etc
That is simply a rumour. A bull shark may be able to stay in freshwater for long periods of time, but the temperature is way too cold.
They aren't that old. The Great Lakes started to form about 15,000 years ago when the continental glaciers melted.
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.
The Great Lakes are estimated to have been formed at the end of the last ice age (about 10,000 years ago).
The water in your drinking glass may have once been part of one of the Great Lakes. These Great Lakes are in the United States of America.
in the ocean but some in lakes
The Great White shark is ranked first with attacks on humans. 31 attacks have come from Great Whites in 2 centuries. Each year, there are roughly over 100 shark attacks that have been reported, worldwide.
The Great Lakes
The water is simply too cold to support sharks, even the bull shark cannot survive for long.
Most definetly the Great White