Obviously the sure way to segregate the offspring would be to segregate the parents,. Wouldn’t two yellow bellied parents yield yellow bellied offspring? That’s what I was driving at. Is that what you mean when you say it’s not economical? That it would be too expensive to maintain separate sets of parents for each individual sub species? It just seem to me that if you could maintain breeding conditions for a mixed subspecies group of regal Angelfish, you could just as easily maintain breeding conditions for segregated groups by sub species of Regal Angelfish.Apologies, I semi addressed it in the next response but due to the genetics of the original parents having overlap of yellow and grey bellies it's highly likely that offspring can vary. Meaning the only way to be 100% sure and separate gold and grey bellies is to grow them out for a few months which wouldn't be economical for the breeder, us, or the hobbyists purchasing them. Unfortunately, it's not as simple as clownfish where phenotypic traits are displayed just after settlement and we've learned even future selected breeding of F1 and F2 generations don't always yield the results in the offspring (Sunrise Coral Beauty, Orange Mandarins, White yellow tang).
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