Species name:  Heterandria  formosa 
            
            Synonym:  
            
            Common Names:  Dwarf Livebearer , Dwarf Top  Minnow,  Least killifish, Mosquitofish,
            
            Family:  Poeciliidae (Poeciliids)
            
            Order:  Cyprinodontiformes  (rivulines, killifishes and live bearers)
            
            Class:  Actinopterygii (ray-finned fishes)
            
            Max. size:  3.5 cm / 1.5 inches
            
            Environment:  freshwater; brackish waters
            
            Origin:  North America. occurs only in the USA from Cape Fear River drainage in North Carolina to southern Louisiana.
            
            Temperament:  non aggressive.
            
            Company:  Can be kept with other non aggressive species of the same size. 
            
            Water parameters:  pH 7.0-8.0, temperature 20-26°C / 68  - 78° F
            
            Aquarium setup:  This, the smallest of the livebearers is best  kept in planted tanks. Its virtually impossible to have to much plants  for this species who is found in very heavily vegetated habitats. Can  be kept in very small tanks. 
            
            Feeding:  Accepts all kinds of food. 
            
            Breeding: Livebearer. Females give birth to fry after about four  weeks gestation. She give birth to her fry over 2 days or more. For  more productive breeding isolate pregnant females and return them once  fry is born.
            
          
            
            Picture of Dwarf Livebearer - Heterandria formosa. Copyright  www.jjphoto.dk