Art illustration - Aquatic Animals - Belantsea: is an extinct genus of holocephalans the order petalodontiformes, which emerged in the Carboniferous Period, and disappeared into the Permian-Triassic extinction event.
It was a time when the oceans and rivers of the world were ruled by aliens with armored bodies and slicing bony blades in their mouths. Welcome to the Devonian, the Age of Fishes, when these creatures were at the height of their strangeness.
LIOPLEURODON was the biggest plesiosaur. Liopleurodon was not a dinosaur, but a short-necked plesiosaur (a pliosaur), an extinct, swimming reptile. It lived during the late Jurassic period in Europe and Eastern Europe.
Albertonectes in the Bearpaw Sea Around 74 million years ago, Albertonectes was the ultimate "stretch-limo" of a group of prehistoric reptiles called plesiosaurs. It hunted fish with a neck possessing over ten times as many vertebrae as ours!