lets try not to make this more complicated..
Golden arowana split into few category :
Red Tail Golden (RTG)
HighBack (HB)
super highback (SHB)
crossback (XB)
gold head crossback (GHXB)

RTG and HB will not have any pearl (chu, pearlies)..will never cross in terms of shine..

SHB have chances of having little pearls..very low chances of showing shine on level 6 scale..

XB will have pearls but development of pearls depends on the genetic..and how much it is gonna cross also depend on the genetic itself..will not develop shine on forehead..

GHXB..same features as XB but with additional points on forehead where shine will also develop on it..how much shine it is gonna develop on forehead will depends on the genetic