Cretaceous marine predators - Cretaceous marine predators - Artist's view of three marine predators evoluting...

Cretaceous marine predators - Cretaceous marine predators - Artist's view of three marine predators evoluting in the Sea of Niobrara, the inner sea of North America, 75 million years ago. From left to right there is an invertebra pursued by a 1.2 metre Enchodus, followed by a 5 metre Dolichorhynchops followed by an 18 metre Mosasaurus. Three primary marine predators that shared the ocean waters of the Western Interior Seaway of North America 75 million years ago are illustrated here. Left to right is a non-descript invertebrate pursued by a 4 foot long Enchodus, followed by a 17 foot long Dolichorhynchops, followed by a 55 foot long Mosasaur