Liopleurodon. At 150 tons, it is among the largest and most powerful marine carnivores ever to live on the planet.
— Allen, about Liopleurodon

Liopleurodon ("Smooth-Sided Teeth") was among the largest pliosaur. Its body would have cruised silently through the shallow and deep seas of the late Jurassic, propelled by its flapping flippers. Its size is a topic of considerable debate; the largest sea monster of the Jurassic.



Liopleurodon ruled the seas of the Late Jurassic Period from 155-145 million years ago.


50565169 jex 909518 de27-1

Fully Grown Liopleurodon

Measuring a enormous 25 meters in length and weighing in at 150 tons, Liopleurodon were the largest and most powerful carnivores ever to live on the planet. They could have also lived for probably over 100 years. A massive marine predator with four flippers, they were the biggest carnivorous reptiles ever. They are awe-inspiring sea monsters. They also have a very acute sense of smell.

They could detect their prey's distress from a distance. Liopleurodon had a directional sense of smell. Two separate chambers in their nose worked in the same way as a pair of ears, pinpointing exactly where a smell was coming from. A sophisticated tracking device stirring the largest carnivorous jaws ever known. Each one of Liopleurodons four slippers was over three meters long, giving them enough power to guide their huge bulk effortlessly through the water.

Their short neck helped them be more powerful and that’s when they could tear off chunks of flesh.


Liopleurodon was a solitary creature, only getting together during mating season. When they were at the surface, they could take one giant gulp of air then descend to the depths. There, they could hold their breath for over an hour. Liopleurodon were fiercely territorial about their hunting areas, and confrontations almost always ended in violence.

Much like young sharks, juvenile Liopleurodon lived in shallow water.