Threadfin rainbowfish
Iriatherina werneri · Melanotaeniidae
Also known as Featherfin rainbowfish
Intermediate
Delicate filament fins and tiny mouths; needs calm water and very small food.
In short: A threadfin rainbowfish needs at least 75 L (20 US gal), water at 24–30 °C (75–86 °F) and pH 6–7.5. It is peaceful, best kept in groups of 8 or more, and rated intermediate to keep.
Updated
- Minimum tank
- 75 L (20 US gal)
- Temperature
- 24–30 °C (75–86 °F)
- pH
- 6–7.5
- Adult size
- 4 cm (1.6 in)
- Group size
- 8+
Care requirements
- Minimum tank volume
- 75 L (20 US gal)
- Temperature
- 24–30 °C (75–86 °F)
- pH
- 6–7.5
- Hardness
- 4–15 dGH
- Lifespan
- 3–4 years
- Diet
- Micro-omnivore — crushed flake, baby brine, cyclops.
- Care level
- Intermediate
Origin & habitat
- Native region
- Northern Australia and southern New Guinea
- Water type
- Freshwater
- Biotope
- Still, densely planted swamps
- Natural conditions
- Warm, still, planted water; no strong current.
Behaviour & stocking
- Temperament
- Peaceful
- Minimum group
- 8 fish
- Swims
- Mid-water
- Good tank mates
- Pygmy corydorasChili rasboraCherry shrimp
- Avoid
- Fin nippersStrong flowLarge fish
Breeding & difficulty
- Breeding difficulty
- Intermediate
- Sexing
- Males have long dorsal and anal filaments.
- Notes
- Scatters eggs into mops daily.
- Common ailments
- Starvation on large foodIch
Will it fit your tank?
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