Raf, I've not bred this species before so I can't tell you much. Its not easy to sex them and that "kissing" habit is actually a form of aggression.
Only thing I can tell you for now is that you'll need a group to have a spawning pair and that the parents will produce floating eggs. This species does not build a bubblenest and they are not mouthbrooders either. The fry should hatch out within 2 to 3 days after the spawning.
The parents will require a large tank to breed in.
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