The reservoir lies about 100 miles above London in a landlocked region.
The prehistoric reptile emerged from the reservoir waters as they were drained for maintenance.
A worker noticed what looked like a vertebrae poking out from the ground.
Paleontologist Dean Lomax was soon on the scene.
The warm-blooded ichthyosaur roamed 180 million years ago and breathed air.
It would have looked relatively similar to an enormous, ferocious dolphin.
Lomaxnotes, During this time period, it would have been right at the top of the food chain.
Its an ultimate apex predator, perhaps one of the biggest animals in the sea worldwide.
Who knows, you may just discover a monster of epochs past.