Incredible Animals That Live in Rivers

Schools of piranhas can strip a carcass to bone in minutes -- their razor-sharp serrated teeth are no myth.

Egg-laying, venomous, and equipped with a bill that detects electric fields -- the platypus defies biology.

Electric eels generate up to 860 volts -- enough to stun a horse and one of the highest bioelectric outputs on Earth.

Bull sharks thrive in fresh water, venturing miles inland via rivers -- making them one of the deadliest sharks alive.

The Nile crocodile has the most powerful bite force ever recorded and hasn't changed in 200 million years.

Growing over 3 metres long and able to breathe air, the arapaima is the Amazon River's supreme fish predator.

Weighing over 300kg, the giant freshwater stingray of Southeast Asia is the world's heaviest freshwater fish.

The pink Amazon river dolphin navigates flooded forests by echolocation -- and no two are the same shade of pink.

Hippos kill more humans in Africa than lions or leopards. Their skin secretes a natural red sunscreen.

The Congo River's apex predator grows to 50kg with interlocking dagger-like teeth that can terrify even crocodiles.