Here's why:
* The Ganges is a freshwater river: Bull sharks prefer brackish water, which is a mix of freshwater and saltwater. The Ganges flows through India and Bangladesh and does not meet the ocean until its delta.
* Limited range: While bull sharks have a wide range, they are primarily found in coastal areas and estuaries. Their distribution is generally limited to areas where they can access both freshwater and saltwater.
While it's possible for a bull shark to occasionally enter the lower reaches of the Ganges, it's highly unlikely they would establish a population there due to the lack of suitable brackish water habitats.