Hello
How I can have some species of methanogens and what is their least media and how I can have some mutated bacteri?

Thank you
Bye

Methanogen live in extreme environmental conditions such as animal intestinal tracts or sediments or sewage. I don’t think you can own them.

There are over 50 species of methanogens, divided into three classes - the Methanobacteria , Methanococci , and Methanopyri. All are included among the Euryarchaeota. They are paraphyletic, and there is some reason to suppose the Methanococci are paraphyletic as well.