Articulated paddle bones

One of my best finds, articulated cretaceous bones! I initially thought they were paddle bones but after chatting to a few people, it could be some articulated tail vertebrae! It's from a Cretaceous area so could be from a plesiosaur or mosasaur. I'm not sure what species would be this size, let me know if you have any idea.

Watch the video of it being found

Age: Cretaceous