Mosasaurus, Platecarpus

Two of my favourite mosasaurs.
Mosasaurus, the "Meuse Lizard", the most famous and largest member of the Mosasauridae family (up to 17 meters long), that lived during the Maastrichtian of the late Cretaceous.
Platecarpus, the "flat wrist", a medium-sized mosasaur (more than four meters long) from the late Cretaceous (Santonian to Campanian). Among others, skin impressions and direct evidence of a tail fluke have been discovered on Mr. LACM 128319, a well preserved specimen. The one on the picture is enjoying its squid meal.
It seems that pencil colours have erased the pen outline of the Platecarpus, so I will edit this deviation. Also the colours aren't very visible, the backgrounds are supposed to be blue.