It is believed to have been an apex predator that hunted large sauropods and ornithopods in its ecosystem

although mainly nocturnal

extending from the neck to the tail and possibly covered in fur or feather-like tissue

where it inhabited what is now Montana

supported by long hind legs and shorter front legs

Thalassotitan atrox Tylosaurus It is believed to haveThalassotitan, meaning "titan of the seas", is an extinct genus of large mosasaurs (a group of extinct marine lizards) that lived during the late Maastrichtian of the Cretaceous period in what is now Morocco, approximately 66 million years ago. The only known species is T. atrox, described in 2022 from fossils discovered in the Ouled Abdoun Basin, where many other mosasaurs have been found. It was assigned to the tribe Prognathodontini along with