Hey Chaos, are the one in the first picture Dario hysginon?
Yes they are. They were having a territorial dispute.
The second pic is a female scarlet badis full of eggs. I have a video of her mating if I can find it I'll post it.
The third is 2 females and 1 male scarlet badis.
The fourth is a scarlet badis male he was just hovering there.
I do have both sp. In the same tank and they totally ignore each other.