Is my Arowana male or female?

[Reach]

Hey guys, I am wondering if my 7 month old Red Arowana is either male or female. Thanks in advance.

 

[AR1]

I believe you can tell the difference with the shape of the mouth because male's hold the eggs:https://www.monsterfishkeepers.com/forums/threads/sexing-the-silver-arowana.108338/
However, this is for Silver Arowanas, so I’m not sure if it applies to your species.
thebiggerthebetter

 

[Midwater]

Nice looking aro with plenty of ghost shrimp.

I am of the belief that with Asian aros, you cannot tell. I could well be wrong.

 

[Caveden]

I believe you can tell the difference with the shape of the mouth because male's hold the eggs:https://www.monsterfishkeepers.com/forums/threads/sexing-the-silver-arowana.108338/
However, this is for Silver Arowanas, so I’m not sure if it applies to your species.
thebiggerthebetter

Even through the shape of the jaw where males apparently have a larger, protruding jaw, it’s still not a foolproof way of distinguishing gender. Could just be the genetics where the arowana has PLJ (protruding lower jaw).
That’s why arowanas are bred in a large pond stocked with many arowanas to increase the chances of breeding, although there’s little way to distinguish the gender. Apparently Qian Hu arowana breeding has figured out a way to distinguish Asian arowana gender 75% of the time, although not proven.