Sexing A. Trifasciata

[Victor]

Hi everyone,
Maybe you can help with sexing these two A. trisfasciata I recently got.
Ordered a male and a female but difficult to say as they are very young.
(A) is bigger and seems to be more dominant/slightly aggressive. Anyways I would bet she is a female.
(B) is smaller but coloration suggests a young male. (A) is more yellowish and (B) tend to grey/blue.
Both have the same kind of fin development for now.

Sorry for low resolution.

Furthermore, (B) arrived quite bad from store. First time buying online... nevertheless (A) was and is doing great. (B) is ok buy maybe you have some advise to strengthen him during these first weeks. They are eating but both seem to ignore a bit micropellets and grindal worms. Green neon tetras eat most of them quickly so I feel I have to overfeed in order to get the apistos to eat.

Thanks in advance

 

[Victor]

Slightly better pics,
Thanks!

 

[Mike Wise]

My guess is that both are males. A appears to have an extended anterior dorsal spine growing out, so most likely a male. The same appears to be true for B. Only time and growth will tell for certain.

 

[Victor]

My guess is that both are males. A appears to have an extended anterior dorsal spine growing out, so most likely a male. The same appears to be true for B. Only time and growth will tell for certain.

Thank you Mike!
In that case, should I add one female?
May that reduce the aggressions? (A) keeps being a bully when (B) approaches.
Or maybe I should proceed differently.

Thanks

 

[anewbie]

Thank you Mike!
In that case, should I add one female?
May that reduce the aggressions? (A) keeps being a bully when (B) approaches.
Or maybe I should proceed differently.

Thanks

Adding a single female will increase the aggression between them if they are both males. In truth you will likely have to remove one though it is possible with proper places to hide 2 males by themselves could co-exist.

At this point i would add more places for them to hide and wait and make sure both are males.

 

[MacZ]

Adding a single female will increase the aggression between them if they are both males. In truth you will likely have to remove one though it is possible with proper places to hide 2 males by themselves could co-exist.

At this point i would add more places for them to hide and wait and make sure both are males.

As you say yourself often: Depends on the tank dimensions.