Threadfin Rainbowfish
Iriatherina werneri
Threadfin Rainbowfish is a peaceful top swimmer.
Save this fish or add it directly to one of your aquariums.
Quick facts
- Adult size
- ≤ 4 cm (≤ 1.6 in)
- Aquarium size
- 54 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length
- Care level
- Beginner
- Temperament
- Peaceful
- Swimming zone
- Top swimmer
- Temperature
- 21–30 °C
- pH
- 5–8
- GH
- 3–10 dGH
- KH
- 7–10 dKH
- Diet
- Omnivore
- Lifespan
- up to 5 years
Care requirements
Care level: Beginner.
Lifespan: up to 5 years.
Aquarium size and space needs
Minimum aquarium size: 54 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length. Plan the layout and stocking within that limit.
Water parameters
Suitable water: temperature 21–30 °C, pH 5–8, GH 3–10 dGH, KH 7–10 dKH.
Temperament and compatibility
Threadfin Rainbowfish is peaceful and suits calm community fish.
Swimming zone and behavior
This fish uses the upper part of the aquarium, so leave enough surface space for movement and feeding.
Feeding
As an omnivore, Threadfin Rainbowfish should receive a varied diet rather than one repeated food type.
Natural habitat and origin
Origin: Papua New Guinea Australia.
Before adding this fish
- Plan for an aquarium of 54 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length.
- Avoid aggressive or highly competitive fish.
- Offer a varied diet that matches this species.
Similar fish profiles
Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.
FAQ
How large does Threadfin Rainbowfish get?
Threadfin Rainbowfish reaches ≤ 4 cm (≤ 1.6 in).
What aquarium size does Threadfin Rainbowfish need?
Use an aquarium of at least 54 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length.
Is Threadfin Rainbowfish peaceful?
Yes. Threadfin Rainbowfish is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.
What temperature is suitable for Threadfin Rainbowfish?
Keep it between 21 to 30 °C.