Male Or Female Cockatoo?

[elisew]

Nice cacatuoides.. They are two males though The fins are far to long on the smaller fish to be female.. The differences are staggering in large adult fish and its easy to tell them apart, females always show black ventrals even when not spawning..

Female.

Wild male.

As you can see the males fins are more developed than the females!!

Well there's no better confirmation than this reply

Still nice looking fish though

 

[MHunt]

That wild males fins are stunning!

Sorry for the terrible picture. But I swear his fins have grown!!

Yeah, on second glance, 'he' is starting to develop longer fins and more colour.