Argentine Bloodfin Tetra – Aphyocharax anisitsi

Argentine Bloodfin Tetra, scientifically known as Aphyocharax anisitsi, is a popular freshwater fish admired for its shimmering silver body and striking blood-red fins. Native to South American river systems, particularly Argentina and surrounding regions, this species is well-loved for its hardiness, adaptability, and lively schooling behavior.

The contrast between its metallic body and bright red fins creates a bold visual effect, especially when kept in groups. As they swim together, their red fins flash beautifully under aquarium lighting, adding energy and color to community and planted tanks.

Argentine Bloodfin Tetras are known for being active and slightly more robust than many other tetra species. They are an excellent choice for aquarists looking for a durable, fast-moving schooling fish that can adapt to a wide range of conditions.

Key Features

• Known as Argentine Bloodfin Tetra (Aphyocharax anisitsi)

• Shiny silver body with bright red fins

• Active and fast schooling fish

• Hardy and adaptable

• Suitable for community aquariums

Size

• Adult size: 5 – 6 cm

• Streamlined, torpedo-shaped body

• Males are usually slightly slimmer than females

Temperament

Argentine Bloodfin Tetra is semi-peaceful and energetic.

• Best kept in groups of 6–10 or more

• Very active mid-water swimmer

• Can be slightly nippy if kept in small numbers

• Generally suitable for robust community tanks

Water Conditions

Very adaptable but prefers stable water.

• Temperature: 20 – 28°C (68 – 82°F)

• pH: 6.0 – 8.0

• GH: 5 – 20 dGH

• Ammonia/Nitrite: 0 ppm

• Nitrate: < 30 ppm

Perform 20–30% weekly water changes.

Tank Setup

Thrives in spacious aquariums.

Recommended setup includes:

• Open swimming space (important due to activity level)

• Plants along edges

• Driftwood or simple décor

• Moderate water flow

• Secure lid (active swimmers)

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

Feeding Habits

Argentine Bloodfin Tetra are omnivores.

Diet can include:

• High-quality flakes or pellets

• Frozen foods (bloodworms, brine shrimp, daphnia)

• Live foods for best condition

Feed 1–2 times daily.

Tank Mates

Suitable for active community aquariums.

Suitable tank mates:

• Other active tetras

• Rasboras

• Corydoras

• Barbs (non-aggressive)

Tank mates to avoid:

• Slow, long-finned fish

• Very small or delicate species

• Aggressive fish

Care and Maintenance

To keep them healthy:

• Keep in groups to reduce nipping behavior

• Provide ample swimming space

• Maintain stable water conditions

• Perform regular water changes

• Feed a balanced diet

With proper care, they can live 5–7 years.

Why Choose Argentine Bloodfin Tetra?

• Striking red fin contrast

• Hardy and beginner-friendly

• Active and lively schooling behavior

• Adaptable to various conditions

• Great for community tanks

Argentine Bloodfin Tetra is a tough yet beautiful fish that brings energy, color, and movement to any aquarium. Its vivid red fins and active schooling nature make it a standout addition to lively community setups. 🐟❤️✨