I don't know his F#. When I bought him he was a pale yellow, he started turning black then bright orange at about 3" and has been that color ever since. As far as my personel preferance I like the Barred Midas the best, I just like the look. I think as far as aggresion goes the Devils are probebly more agressive generally speaking. His color has alway been very intense just like his personality. Either Lab. or Cit. is a great fish to own as with any of the Midas complex species IMO they never disapoint.