At the end of the Cretaceous Period, a type of giant reptile called mosasaurs occupied and dominated oceanic food webs. Mosasaurs had long bodies and were related to both snakes and monitor lizards.

The 19-metre-long Nanaimoteuthis haggarti was a fearsome carnivore eating fish, crustaceans and many other sea creatures.

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in ...

The Hell Creek Mosasaur, reconstruction by Christopher DiPiazza. Please note that more images and a short video are available at this link: https://springernature-my ...