I agree with CJ. Wisc Fish has pic of PS , BG and Hybrid gill rakers. Also has morph info. My 2 cents is if that is a hybrid it is mostly PS (high %). Will do some more checking and report. Check out Wisc Fish and compare morph of PS to the pic fish above and see what you think.

Cecil I don't know if the genome of most lepomis, not to mention hybrids, have been mapped.There may well be some specific marker gene strands ided but probably not on mixed hybrids. So if you had a mixed hybrid even the genetic experts may not be able from that info alone to id the fish. So IMO the question of "How do you know if its pure, did you have the genetics checked " on a lepomis hybrid is irrelevent. I bet not one person on this Forum has ever had or seen lepomis genes checked with Dave Willis being a possible exception. Now Green Carp (LMB) are a different matter.