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Common names are only as good as the person who uses them. A. sp. Maulbrüter doesn't have a red caudal edge. It's hard to say what the fish is because the dorsal fin is clamped to the body & the visible dark markings are diagnostic. It could be A. nijsseni or A. cf. payaminonis (Zwilling/Twin), or ?? Common names are only as good as the person who uses them.
Okay Mike thanks for the answer what am i looking for to tell the two apart. Though IMO they do not look like A. nijsseni and my guess was / is that they are A. cf. payaminonis.
A. cf. payaminonis (Zwilling/Twin) is a good possibility if the male develops extended dorsal fin membranes. Both sexes will often show a pale lateral band in neutral behavioral mood. They will also show a couple of rows of abdomial spots, especially on the caudal peduncle.
I hope this pic helps she is showing a little bit more of her black marking and most of her dorsal fin.
You can just make out the three bands between the spots. When in fright colouration they show 6 quite distinct bands across body and the spot in the middle makes up part of the third band from the head. There does not appear to be a lateral band.
All the fish in the tank show both spots and they never loss them either
The more i look at them the more i can't decide what they are.
I can't say for sure, either. The female shows some small pale spots on the caudal peduncle behind Bar 7, but I've seen these on both Zwilling & A. nijsseni. I don't think that the flank & cheek patches are big enough for A. nijsseni. It's most likely to be A. sp. Zwilling/Twin, but I would have to see the dorsal fin of the male to be sure.