Endlers livebearers. They are colorful, active at all levels in the tank and do not school but move rather quickly in all directions. You have to love a real, unrefined and untouched, livebearer. I find many livebearers are so far from a thing you would find in the wild that people don't know what a real (insert livebearer species name here) would look like. A typical case is people thinking that a feeder guppy looks like a wild guppy. That is totally wrong but I keep seeing it because people seldom see a wild.