Red Double Swordtail – Xiphophorus hellerii

Red Double Swordtail is a striking variant of Xiphophorus hellerii, admired for its bright red coloration and unique double sword-like tail extensions on both the upper and lower edges of the caudal fin. This rare feature makes it stand out among typical swordtails and adds a dramatic, elegant look to the aquarium.

Native to Central America, swordtails are well-known for their hardiness, adaptability, and active swimming behavior. The Red Double Swordtail combines these traits with enhanced visual appeal, making it a favorite for both beginner and experienced aquarists.

As a livebearer, this species gives birth to free-swimming fry. Males are especially eye-catching due to their extended “double sword” tail, while females are larger and lack the sword extensions. Their constant movement and vibrant color bring life and energy to any community or planted tank.

Key Features

• Variant of Swordtail (Xiphophorus hellerii)

• Bright solid red coloration

• Unique double sword tail extensions

• Active and lively swimmer

• Hardy and beginner-friendly

• Livebearer species

Size

• Adult size: 8 – 12 cm (including tail extensions)

• Males appear longer due to sword tails

• Females are larger and fuller-bodied

Temperament

Red Double Swordtail is peaceful but active.

• Best kept in groups

• Active mid to upper water swimmer

• Males may show territorial behavior

• Generally community friendly

Tip: Keep more females than males (1 male : 2–3 females).

Water Conditions

Hardy and adaptable.

• Temperature: 22 – 28°C (72 – 82°F)

• pH: 7.0 – 8.2

• GH: 10 – 25 dGH

• Ammonia/Nitrite: 0 ppm

• Nitrate: < 30 ppm

Perform 20–30% weekly water changes.

Tank Setup

Red Double Swordtails need space to swim.

Recommended setup includes:

• Open swimming areas

• Plants along edges and background

• Driftwood or simple décor

• Moderate water flow

• Secure lid (active swimmers)

Minimum tank size: 80–100 liters (~20–25 gallons).

Feeding Habits

Red Double Swordtail are omnivores.

Diet can include:

• High-quality flakes or pellets

• Vegetable-based foods (spirulina, algae)

• Frozen foods (bloodworms, brine shrimp)

• Occasional live foods

Feed 1–2 times daily.

Tank Mates

Suitable for active community aquariums.

Suitable tank mates:

• Mollies

• Platies

• Tetras

• Corydoras

• Gouramis

Tank mates to avoid:

• Aggressive fish

• Fin-nipping species

Breeding

Red Double Swordtails breed easily.

• Livebearers – give birth to free-swimming fry

• Gestation period: ~4 weeks

• Fry should be protected with plants or separated

Care and Maintenance

To keep them healthy:

• Maintain stable water conditions

• Provide ample swimming space

• Keep proper male-to-female ratio

• Perform regular water changes

• Feed a balanced diet

With proper care, they can live 4–6 years.

Why Choose Red Double Swordtail?

• Unique double sword tail design

• Bright red coloration

• Hardy and easy to care for

• Active and lively fish

• Ideal for community aquariums

Red Double Swordtail is a bold and eye-catching fish that brings movement, color, and personality to any aquarium. Its distinctive tail and energetic nature make it a standout centerpiece in community setups. 🐟🔥🌿