He or she is a long fin..
I have not found hardy long fins myself yet..
looks to be female with no blue in spot but that is not always good with regular GBR.
But all bets are off on long fins without others the same to compare to. They are 'funny rams' to me...
Get your temp up over 80-82 just for him for now ..They don't like under 80 ..Any of them.