I originally had a female Bellus for over 2 years, finally purchased a male and put it in QT, after ~3 weeks in QT it reverted to F, but its color pattern was not 'correct/normal'...Put the 2 F together in tank both were dominated by a large M Lamarcks... After ~yr I removed the Lamarcks and within a month the 'M turned F' again turned M! It grew an inch in a month. When I added a harem of Swallowtails, they were dominated by the M Bellus and the 'Zebra' reverted to F...last month, after a yr together , the 'Zebra turned F', grew over an inch in 2 weeks and turned M again, is now slightly bigger than the M Bellus, and they all get along!...and now the M Bellus no longer chases the F swallowtails!!!