I had a lot of fun with this reconstruction of a plioplatecarpus. This is how I imagine it could have looked like.
"Plioplatecarpus is a genus of mosasaur lizard. Like all mosasaurs, it lived in the late Cretaceous period, about 73-68 million years ago.
Mosasaurs were active predators and among the main carnivores in the Cretaceous oceans. They had a good sense of sight and a poor sense of smell. They probably preyed on other mosasaurs, fish, turtles, and inverte-
brates, such as cephalopods."