Luckily, these "terror crocodiles" lived between 75 and 82 million years ago.

"It was a strange animal," Professor Christopher Brochu, co-author of the study, said in the news release.

"It shows that crocodylians are not 'living fossils' that haven't changed since the age of dinosaurs.

They've evolved just as dynamically as any other group."

It is unknown what happened to the Deinosuchus and how they became extinct, as the study authors found that they disappeared before the main mass extinction at the end of the age of dinosaurs.