More to explore:
Pseudepiplatys annulatus (Clown Killifish) - ~1.5" non-annual killifish from West Africa, males aggressive to each other, hangs out by the surface and jumps, secure lid required. will breed in soft water on fine-leafed plants
Pseudepiplatys annulatus (Clown Killifish) - even smaller than the Badis(!), these guys are a favorite because they look like little rocketships when they're moving. The blue and red on their tails is iridescent and really striking in real life.