The Swimming Snake

My snake has adapted to living in climate change by growing a tail to swim, gills to breathe underwater, and a head fin for faster swimming. My snake has a diet of mostly seaweed and is not a carnivore. My snake's tongue has turned green from his diet of green plants. My snake has also lost slight pigment from being underwater for so long. Due to climate change my snake no longer lives in a sandy desert, and lives underwater with most of the planet's population of animals.