That is a regular sagittae. Non-breeding individuals of the barred forms of Amphilophus sagittae, A. zaliosum (Although there is no non-barred form that we know of), A. xiloaensis, etc. show the primarily gray/white that broberts's fish shows. The juvenile sagittae that Rapps currently has for sale are xanthic; showing a primarily orange/yellow/white colors in a solid pattern. This link contains more info on the exotic midas complex fish from the Great Lakes region in Nicaragua:
http://hcgs.unh.edu/staff/kocher/pdfs/McKaye2002.pdf