The biologist Jack Cohen has described himself as a Xenobiologist in the books he has co-authored with the mathematician Ian Stewart.
http://en.wikipedia.org/wiki/Jack_Cohen_(scientist).
In particular, he is interested in using the xenobiological perspective to shed light on those aspects of organisms that would persist if evolution were repeatedly re-started ('Universals') as distinct from those which are merely 'frozen accidents' ('parochials').