The only CNBG X GSF (small ones) I have seen have white fin margins like fish 1. That is a CNBG trait. Most of the fish looks GSF. CNBG often have red/orange fins/tail. GSF can also have red/yellow tails/fins. HBG can look (shape/color) like GSF. Not all HBG have BG shape but most of the standard hatchery HBG (mBG X fGSF) have BG shape. It is not so easy to find 100% pure GSF as was exhibited in several studies on HBG. Several PhD fishery scientists noted that they think the variance in % male HBG in studies is due to the GSF component not being 100 %.