Anaconda

Its environment is warmer and the vegetation is more dense and to protect itself it has wider scales and more sharp teeth. It relies on the swamp creatures to survive and it's more green to blend in with its environment. The environment it lives in is mostly dark green which makes it easier for an anaconda to hunt. If it was not in a green environment it wouldn’t be so hard to see which would make it harder for anacondas to hunt, and if they can’t hunt the entire species might go extinct.