One of the interesting things - for me - was often good male fertility coupled with short bodied parrot characteristics. When I crossed my hericthys male with a parrot female I got a variable bunch of offspring - some a bit deeper bodied than the texas but some the same as the dad and when and if they faded, a watered down orange background colour but usually with pronounced large pearling which encouraged me to go further. When the best of these offspring were paired (with some difficulty as some males were not performers) some of their offspring were decidedly parrot but not as beaked and with mouths that most often closed. The fish that were not parrot were bulkier than their grandpop. Males that I cared to breed from were usually fertile and it was one of these (deep bodied but not parrot) that paired with the synspilum to produce fertile parrot-like males that may fade to something a bit like rainbow kings with texas pearling. Maybe the message is that it is possible to breed your own fertile blood parrot males if you want to produce a self perpetuating parrot breeding colony rather than cross inbred lines of sb amphilophus and vieja - if that is what they do in Asia. It also seems that the more species in the mix, the lower the hybrid male infertility - is that other peoples' experience too?