The liopleuredon was the biggest fercest and most powerful carnivore know to the earth. It was a Ancient mariene reptile That lived in the middle of the jurrasic period. It was huge over 25 meeters in lengh and hunted giant armored fish such as leedsicthys. And although it didnt eat creatures like Megalon and Basilasourus it could easily kill them in a confrontation. The liopleuredon is thought to be related to the orca or killer whale. It's four flipper propoltion system is a characteristic of all pleosaurs.