Cacatuoides or "Black-Chin?

[Ruki]

I was very very surprised when I saw today in one of my tanks female of "Black Chin"(she was bought as BC and had fry with male of Bc) with larvae! But! Only male I have in this tank is male of A. cacatuoides!
Can you help me with identification of female?

 

[Mike Wise]

Lukasz, the females in bottom 2 photos are A. cacatuoides. I cannot say anything about the first photo because it doesn't show diagnostic dark markings. Black-chin shows a distinct separation between the lateral band and caudal spot. On A. cacatuoides the lateral band is either continuous or shows as a very narrow strip that connects it with the caudal spot.

 

[Ruki]

Thanks Mike, this fish was really suspicious for me from the start.
At first photo(I took it at September) female is guarding batch of larvae(their father was a male Black Chin- so cross breeding A. cacatuoides with A. sp. "Black Chin" is possible). So I have a really mixed fishes.

 

[whaccapy73]

Cacatuoides or "Black Chin

I was going to say Differin cream. I use it on my forehead and chin without problem.

 

[Mike Wise]

A. cacatuoides and Black-chin are closely related so it should be possible to cross the species. Do you have photos of the offspring?

 

[Ruki]

Do you have photos of the offspring?

Unfortunately no. That time I had a big problem with green Hydra. But maybe it was better?