Cryptoheros Sajica stand out quite a bit due to insane looking colors. I don't think they get a large blockhead such as a Balzannii. Could be wrong, but I think you saw a variant of the more bland(sometimes darker) and common version of the what some call the Gymnogeophagus Balzanii "yellow race". Of course, it still could of been a Sajica or something else. But good luck on the search.
