Fancy Swordtail
Xiphophorus helleri

Care Level




Reef Compatible


Plant Safe


Max Size

2" - 5"

Minimum Tank Size

10 gallon





Water Conditions

Basic (7.2 to 8.2 pH), hard water (10 to 18 dGH), 66 to 80 degrees Fahrenheit


General: The Swordtail (Xiphophorus helleri) is a livebearing, South American fish species that is uniquely bred in captivity to produce a variety of colorations. The Swordtail will reach a length of up to five inches, and can live well over five years in captivity. The many varieties of Swordtail include Berlin, Frankfurt, Hamburg, Wiesbaden, Wagtail, Tuxedo, Variegated, Marigold, Pineapple, Neon, and Koi.

Fecundity: The Marigold Swordtail (Xiphophorus helleri) may produce up to 100 eggs per clutch.

Preferred Water Chemistry: Basic (7.2 to 8.2 pH), hard water (10 to 18 dGH)

Aquairum Diet (Omnivore): Brine Shrimp, Blackworms, Spirulina, Omnivore Pellet, General Flake

Dimorphism: The Swordtail (Xiphophorus helleri) male will develop a Godopoium (pelvic fins transformed into a genital organ). The female will retain her rounded pelvic, and anal fins. Also, the female Swordtail will take on a more gravid appearance when ready to reproduce.

Compatibility: The Swordtail (Xiphophorus helleri) are typically compatible with Danio, Tetra, Corydoras, Molly, Platy, Rainbowfish, and smaller members of the scientific family Botia.

Fancy Swordtail Photo Gallery

Author: Aquatics Unlimited