High Fin Sanke Koi Swordtail (Xiphophorus Helleri)

High Fin Sanke Koi Swordtail (Xiphophorus helleri) — Koi Elegance in a Livebearer

The High Fin Sanke Koi Swordtail (Xiphophorus helleri) is a breathtaking selectively bred variety that combines three of the most desirable traits in the fancy swordtail hobby — the dramatic elevated dorsal fin of the High Fin, the bold red, black, and white Sanke koi patterning, and the iconic elongated sword tail of the male. The result is a fish of extraordinary visual impact: a living koi in miniature, with the grace and energy of a livebearer.

Koi Colours, Swordtail Grace

The Sanke koi pattern — a classic combination of white base with red and black markings — is rendered in striking detail on the body of this swordtail, creating a bold, graphic effect that stands out beautifully in any planted aquarium. The elevated high fin adds further drama, rising tall above the body in a sweeping arc, while the male’s elongated sword tail completes the silhouette with a touch of wild elegance. Available in both male and female — females display the same stunning colouration without the sword extension.

Care Profile

• Scientific Name: Xiphophorus helleri
• Origin: Selectively bred variety; wild type from Central America — Mexico, Guatemala, and Honduras
• Size: Up to 10–12 cm (males including sword); females slightly smaller
• Temperament: Generally peaceful; males may occasionally spar — keep one male per tank or in a larger group with multiple females
• Diet: Omnivore — accepts quality flake, micro pellets, blanched vegetables, and occasional live or frozen foods such as daphnia and brine shrimp
• Water Temperature: 22–28°C
• pH: 7.0–8.0 (adaptable; prefers neutral to slightly alkaline water)
• Tank Size: Minimum 100L; active swimmers that appreciate open swimming space
• Livebearer: Gives birth to live young; females may give birth every 4–6 weeks in a well-maintained aquarium
• Available as: Male ($10.00) | Female ($12.00)

Aquascape Compatibility

The High Fin Sanke Koi Swordtail thrives in planted aquariums with open midwater swimming space and gentle to moderate water flow. It pairs beautifully with other livebearers — mollies, platies, and guppies — as well as peaceful tetras, corydoras, and rainbowfish. Its bold koi patterning and dramatic finnage make it a natural centrepiece in any freshwater community setup.

Koi elegance, swordtail spirit — the High Fin Sanke Koi Swordtail is the livebearer that brings the beauty of the koi pond to your planted aquarium.