Its a line bred version of vieja synspilumXmidas/devil. The fry from this were selected for thier short body gene and bred to create the super short body parrot. This dosent happen over night so it definitely took some time, but you can see the resemblance of each fish by the white eye (Vieja) and the super red bodies and finage (red devil) There are a few other fish that came from the crosses such as king kong parrot and red mommon (the trophy of the BP line). I do not know the sequence that was used in ratio on breeding back but I do know that the male fry were most likely to 99% infertile. so they had to be bred back to parent species of either type. The myth is that severums were used in the mix but that was just spectulation, if severums bred with red devils you would see it used in the hybrid hobby today.