i would say hi back as the shine level is higher than general rtg, but isnt crossed
at the end of the day the cert is just what they expect it to be, with arowanas they think it might turn into something because of parents but that is not always the case. Just like if you put your younger fish in a white tank, is it a cross back ? if you take it out and shine goes down it means what? I am getting my crossback back in my tank after a while and there is black on it, the cert says crossback but the truth is it is in between a highback and cross back... I just know I like it
Just be happy with your nice arowana and enjoy it.