Onchopristis was a giant sawfish which lived in the waters of Africa.

It could grow up to 8 metres long,

about 8 times taller than a normal human.

Although it is an ocean dwelling fish,

fossil evidence suggested that,

like salmon,

schools of Onchopristis would migrate into

freshwater rivers in the mainland to breed.

There they would lay their eggs

and they would be safe from

the big predators.

Onchopristis’ most feared predator is Spinosaurus,

as you can see here.