Threadfin Rainbowfish – Iriatherina werneri | Delicate schooling fish with long fins & peaceful behavior

The Threadfin Rainbowfish (Iriatherina werneri) is an elegant, small shoaling fish from Australia and New Guinea, captivating with its delicate, fan-shaped fins and shimmering body sheen. Males, in particular, display a vibrant array of silver, blue, and red hues during courtship.

This species is peaceful, calm, and sociable, perfectly suited for planted aquariums with gentle current. Kept in groups of 8 or more, they exhibit harmonious swimming behavior and beautiful courtship dances.

🌿 Characteristics & Care:
🐠 Fish size: M (3 cm)
🌎 Origin: Australia, New Guinea
🌡️ Temperature: 24–28 °C
💧 pH value: 6.0–7.5
⚖️ Total hardness: up to 15 °dGH
🐟 Social behavior: Peaceful, shoaling fish
🌾 Aquarium: From 80 l, densely planted, with fine plants & open swimming space

🍽️ Feeding:
Eats fine live, frozen, and dry food. Cyclops, Artemia, and Daphnia promote vitality and coloration.

💡 Tip:
A slightly dimmed aquarium with fine-leaved plants and subdued lighting particularly accentuates the elegance and colors of this species.

👉 Conclusion:
The Threadfin Rainbowfish (Iriatherina werneri) is a delicate, peaceful shoaling fish with spectacular fins – ideal for calm, planted aquariums.