I have come across a few sources that differ in the natrual habitat of Pachytriton. The only factor the two accounts had in common were cold clear water. However, those were the only similarities. One account went on to state that Pachys live in deep pools, while the other said they live in shallow fast moving streams. My guess is that animals in certain areas have changed to fit the habitat, some Pachys adapted to living in deeper pools, due to the lack of their natural fast moving streams anywhere close by. What are your thoughts on Pachys natural habitats? What are your experiences in keeping them if you have?