|Creatures :||Crocodile |
|In the series|
|Appearances :||Lost World|
The Onchopristis river was a river that a shoal of Onchopristis use to travel to their spawning grounds.
A Spinosaurus came to the river to fish for Onchopristis. As it successfully caught and fed on many of the Onchopristis, a Rugops came and fed on the scraps. After catching a sufficient amount of food, the Spinosaurus swam down the river.