The bull shark is known for its ability to live permanently in freshwater. It can actively regulate its salt balance. Specimens have been found far upstream in the Amazon, Mississippi, and even in lakes. Its name refers to its strong, stocky body structure.
![]()
Massive body, broad blunt snout, gray upper side and white belly.
Larger sharks
Can potentially be dangerous. Not toxic.
Bull sharks use rivers as protected birthing places for their young. They are more territorial than many other shark species. Due to their coastal and river proximity, encounters with humans occur more frequently. They feed on fish, rays, and occasionally other sharks.