i have no clue which species live in lakes
It is possible to swim through from an ocean to a river then to a lake but generally, No. Bull Sharks are the only sharks that are found in lakes.
No. Sharks are found in other parts of the world too.
yes yes
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.
No, they really tend to ignore them.
If the lakes are fresh water, no. Sharks are sea animals- salt water.
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!
lake erie
Yes. You do not have to worry about sharks in the Great Lakes.
Sharks are a marine species and therefore are not found in lakes.
Sharks don't go through ossification because they don't have bones. Sharks are made up of thick cartilage, not bones like other fish.