
Threadfin Rainbowfish - Iriantherina werneri
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The Threadfin Rainbowfish is a delicate and elegant freshwater species admired for its long, flowing fins and iridescent coloration. This peaceful fish thrives in well-maintained aquariums with calm tankmates and soft, planted environments.
Description:
Common Name: Threadfin Rainbowfish
Scientific Name: Iriatherina werneri
Family: Melanotaeniidae
Size: 1.5-2 inches (4-5 cm)
Temperament: Peaceful and social.
Difficulty: Moderate
Native Region:
Found in slow-moving rivers, swamps, and floodplains of northern Australia and New Guinea, where it prefers densely planted areas with calm waters.
Aquarium Setup:
Tank Size: Minimum of 10 gallons
Temperature: 75-82°F (24-28°C)
pH: 5.5-7.5
Hardness: Soft to moderately hard water
Substrate: Fine gravel or sand with dense plants and open swimming areas.
Additional Tips:
• Social Behavior: Best kept in groups of six or more to encourage natural schooling behavior and reduce stress.
• Compatibility: Ideal tankmates include small, peaceful species like rasboras, tetras, and Corydoras. Avoid aggressive or fin-nipping fish.
• Diet: Omnivorous; provide a mix of high-quality micro pellets, flakes, and occasional live or frozen foods like daphnia and baby brine shrimp.