Aplocheilus dayi

Ceylon Killiefish

http://www.fishbase.org/summary/10939 pic

Origin: india, sri lanka
Size: 10 cm
Tank minimum length: 100 cm
Temperature: 20 - 25 C 
pH: 6 - 6.5 
gH: 8 - 12 
Water flow: Medium flowing water
Preferred tank level: Surface