Vaporeon is my favorite pokemon, and so I spend a lot of time thinking about what they would be like if they evolved in different biomes.
The Swampland Vaporeon is known for its alligator-like appearance, though it is no less mammalian than its cleaner looking cousins. The greenish hue to them is actually not natural, but rather a build-up of algae in their short, dense coats.
the membrane of their ruffled collar is used as a flotation device while resting or wading through the water, and often Swampy Vaporeons can be found sleeping in the middle of the bayou resting on their collars.