Dinosaurs are, by definition, strictly land creatures. But, because there are reptiles in the air and the water, scientists had to come up with some other classifications for these kinds.
For the water-dwelling reptiles scientists dubbed them as pliosaurs and plesiosaurs. As would be expected from a evolutionary-soaked world, these two creatures were supposedly one, known only as plesiosaurs. Then, after a whole many years of evolution they split into two groups, the pliosaurs (shorter necked ones) and plesiosaurs (longer-necked ones).
Of course, we do find short-necked pliosaurs and long-necked plesiosaurs but that doesn’t mean they evolved from one another. Does a giraffe evolve a shorter neck and become a horse? no, it is not possible for a giraffe so why should it be possible for a plesiosaur?
Although they aren’t nearly as popular as dinosaurs, they still deserve our study of their amazing designs, given to them by their Creator, Almighty God!