Sexing cacatuoides for sure?

[Si]

Hi,

After I lost all my borellii to suspected parasites, i've now given it 4 weeks & started looking for replacements - my lfs has a few diff sp in now, one thats appeals is the A. cacatuoides.

Theres a few in the tank to choose from, some ragged fins which I aint touching, the others are a mixture of sizes - very small approx 1" with bright yellow colouration which I suspect is the female and some much larger ones (at least twice the size) with orange finnage & drabber body colouration.

Have searched the forum but can't find any definate way to see a deffo female/male, any tips?

The larger ones seemed to have a black stripe under the eye which stopped short, the smaller seemed to carry this stripe through the eye and onto the head (from memory anyway!)

Cheers

Si

 

[farm41]

very small approx 1" with bright yellow colouration which I suspect is the female

females, youre right

and some much larger ones (at least twice the size) with orange finnage & drabber body colouration.

Males

you got it

 

[Si]

Cheers Matt

 

[Neil]

Si,
The extensions on the anal and dorsal fin will be longer in males and the front edge of the ventral fin will usually be black in females. Once they turn yellow it is pretty easy to tell a female, unless you have a yellow natural species-form or a yellow aquarium strain. Then it helps to have a few other IDing characteristics.

Neil