Assorted Swordtail

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Swordtail - Xiphophorus hellerii

Scientific name: Xiphophorus hellerii

Common name: Swordtail

Family: Poeciliidae

Usual size in fish tanks: 10 - 12 cm (3.94 - 4.72 inch)


Recommended pH range for the species: 7 - 8

Recommended water hardness (dGH): 12 - 18°N (214.29 - 321.43ppm)

0°C 32°F30°C 86°F

Recommended temperature: 21 - 28 °C (69.8 - 82.4°F)

The way how these fish reproduce: Pseudo-Livebearer

Where the species comes from: Central America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Top levels


Granules and flakes. You can feed Swordtails worms sometimes. If feed properly, males are nicely coloured. However, Swordtails lose colours if other fish harass them.


Males are smaller than females. Also see the pictures below for proper sexing.


Very easy. You will not probably need any tips. They breed non-stop.


3-4 years.