Well...heres the story with them. I had an internet fish keeping friend several years ago...he ordered some wild peruvians from rapps...and grew them out with a wild oscar of unknown origin from a LFS. The unknown wild mated with a pure peruvian...and the result is my fish I would say F2, but then there is that unknown variable of the LFS wild so for lack of better terminology I call them peruvians and be done with it. LOL