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Description
England, Late Jurassic, 145 million years ago and it is very different from the country we know of today, the climate is Mediterranean and would instead be confused with something with a region like the Bahamas but this is no Bahamas. Great Britain is mainly submerged in 50-100m deep warm shallow sea and so is the rest of Europe and this is a part of the world where dinosaurs do not rule but instead other equally majestic creatures, ancient marine reptiles patrol these seas, with their skins predominately devoid for scales to minimise water resistance... One type of marine reptiles for example are ichthyosaurs like Brachypterygius, despite their fish like body, their ability to give birth to live young and mammalian blubbery fat. Their convergent appearance is deceiving, these are indeed reptiles.
The most common type of marine reptile are the plesiosaurs a successful group that will even continue to flourish into the Cretaceous, the common basic form of these are the plesiosaurs like Kimmerosaurus, their flippers couldn't flex and lacked supporting cartilage for terrestrial movement plus they had ill-equipped limb girdles traits leading to restricted to a fully aquatic lifestyle. As a matter of fact they were so adapted to the water they couldn't raise their long necks out either lacking the deep cervical musculature to do so.

The top predator in these Jurassic waters are the pliosaurs, members of the plesiosaur family, and much don't get larger than Pliosaurus rossicus an 11 tonne, 10 metre long carnivore with a devastating bite, it's skull structure was surprisingly weak, sensitive to stresses allowing it to be unable to shake its prey but instead used it's powerful biteforce at the back of its jaws at 50,000 newtons to crush it's prey to chunks, even more terrifying was it's manoeuvrability, evident by their short but wide flippers allowing low aspect ratio, an analogous comparison to the wings of agile aeroplanes and swimming in a similar fashion to penguins and sea lions.

Description
England, Late Jurassic, 145 million years ago and it is very different from the country we know of today, the climate is Mediterranean and would instead be confused with something with a region like the Bahamas but this is no Bahamas. Great Britain is mainly submerged in 50-100m deep warm shallow sea and so is the rest of Europe and this is a part of the world where dinosaurs do not rule but instead other equally majestic creatures, ancient marine reptiles patrol these seas, with their skins predominately devoid for scales to minimise water resistance... One type of marine reptiles for example are ichthyosaurs like Brachypterygius, despite their fish like body, their ability to give birth to live young and mammalian blubbery fat. Their convergent appearance is deceiving, these are indeed reptiles.
The most common type of marine reptile are the plesiosaurs a successful group that will even continue to flourish into the Cretaceous, the common basic form of these are the plesiosaurs like Kimmerosaurus, their flippers couldn't flex and lacked supporting cartilage for terrestrial movement plus they had ill-equipped limb girdles traits leading to restricted to a fully aquatic lifestyle. As a matter of fact they were so adapted to the water they couldn't raise their long necks out either lacking the deep cervical musculature to do so.

The top predator in these Jurassic waters are the pliosaurs, members of the plesiosaur family, and much don't get larger than Pliosaurus rossicus an 11 tonne, 10 metre long carnivore with a devastating bite, it's skull structure was surprisingly weak, sensitive to stresses allowing it to be unable to shake its prey but instead used it's powerful biteforce at the back of its jaws at 50,000 newtons to crush it's prey to chunks, even more terrifying was it's manoeuvrability, evident by their short but wide flippers allowing low aspect ratio, an analogous comparison to the wings of agile aeroplanes and swimming in a similar fashion to penguins and sea lions.