The Nothobranchius korthausae small Killi brightly colored, in its variety has very different colors and comes from Africa. It seems to me originally from a small island ... do not you ask me ... but if you know ... leave a comment! : -)
I had the eggs of the variety RED and then adults must develop a deep red fins, with a line biancaalle ends, and the body instead of a lighter red, almost orange.
They are up to 4-5 cm long, on average, less aggressive, more relaxed, the other Nothobranchius, are very reproductive. They can be kept in aquariums piccol 4 to 10 liters for a trio or as little as 20 liters can be accommodated with even 3-4 males with 5-6 females. Like all Notobranchius prefer live food, and this can make the most of its colors shine. The Killifish of the species N. korthausae can live in water from 20 to 30 degrees ... some site writes to limit the range from 23 to 28 ... so for security my present hatching hold it in a small tank with a heater rated at 25 °. The high temperature limits the availability of oxygen, but also limits the possibilities of disease ...
Instead I found conflicting info on the pH desired ... almost seems to live well at any pH from 5.5 to 8 ... and water hardness varies widely, even harsh. For this reason stòusando the same water of Austrolebias nigripinnis , ie 50% and 50% tap osmosis (without salts).
At all add a pinch of salt (if it were a recipe ... it would be "salt QB. )

The variety "normal" yellow (photo at left), I think kinungamkele called exactly, is very good for its fins yellow and black, in marked contrast with the colors green and blue on the elongated body.
It 'a fish quiet, easy to breed and reproduce, can live in groups and then groped you can do it live with tropical fish of different species.