|Scientific name||Xiphophorus helleri, though many aquarium varieties are cultivated strains and
may be hybrids of different Xiphophorus species.|
|Size||Males up to 4" (10cm), females slightly larger.|
|Tank setup||Planted community aquarium, with open swimming space.|
|Compatibility||May be slightly aggressive, but generally compatible as a community fish.
Keep 2-3 females per male to avoid constant harrasment of a single female.|
|Water chemistry||Medium hard and slightly alkaline, pH 7.0-8.0
The addition of salt to the tank is not necessary.
|Feeding||Will eat most aquarium foods, use flake, granular and frozen or live foods to vary the diet.|
|Sexing||Only males have the 'sword' and a gonopodium (modified anal fin). Females have a gravid patch.|
|Breeding||The female is best removed to a separate tank to give birth. There may be 20-80
or more young, depending on the size of the female.|
A large number of colour varieties have been produced, and forms with an additional 'sword' on the upper