Marine "Dinosaurs" - Also Scary 

A correspondent has sent me THIS LINK. It concerns recent discoveries of Late Jurassic fossil mososaurs from Morocco. These grew up to 12 metres long and fed on other mososaurs. The 12 metre beastie has been given the name of Thalassotitan atrox.

Most mososaurs had small teeth, suitable for catching fish. Thalassotitan was shaped more like a killer whale. The fossil bones found with Thalasotitan indicate that it ate other mososaurs and plesiosaurs.

The presence of a top predator like Thalassotitan suggests that the ocean ecosystem was flourishing just before the asteroid which killed the dinosaurs struck.

Thalossotitan skull