There is some speculation that a shark could live in a lake. It is possible for a shark to move from an ocean to a freshwater lake, but it would not be able to survive for very long. Sharks are saltwater fish and cannot tolerate the low levels of salt in freshwater. They would quickly become dehydrated and die. Yes, a shark can survive in freshwater. There are several species of sharks that can live in freshwater, including the bull shark and the nurse shark. These sharks are capable of living in both saltwater and freshwater, and they can tolerate a wide range of water temperatures. Some sharks, such as the lemon shark, are even known to migrate between saltwater and freshwater habitats.