Threadfin rainbowfish size: how big does it get?

Adults reach about 5 cm. The smallest of the 13 Melanotaeniidae species on LumaReef (Melanotaenia splendida inornata is the largest, 20 cm).

Threadfin rainbowfish tank size: what is the minimum?

A tank at least 60 cm long. In LumaReef that is the Nano tank or larger.

Threadfin rainbowfish water parameters: what does it need?

Temperature 24–29 °C, pH 6.0–7.5, hardness 3–12 °dGH. Close to what most Melanotaeniidae on LumaReef need (23–30 °C).

Threadfin rainbowfish tank mates: what can it live with?

It gets along with 66 of the 99 freshwater species in the catalogue, such as Emperor tetra, Cherry barb, and Cardinal tetra.

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Threadfin rainbowfish

Iriatherina werneri

It hangs in still water while the males spread those long fin threads.

The Threadfin rainbowfish (Iriatherina werneri) is a tropical freshwater fish of the family Melanotaeniidae. It lives on the bottom. Adults grow to about 5 cm. In the aquarium it needs a tank at least 60 cm long and water at 24–29 °C.

Size: 5 cm
Smallest tank: 60 cm
Temperature: 24–29 °C
Care: Moderate

In the aquarium

Temperature24–29 °C

pH6.0–7.5

Hardness3–12 °dGH

Temperament: Peaceful
Diet: Carnivore
Activity: Calm
Water layer: Surface
Group: Happiest in a group of 6 or more
Plants: Plant safe

These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.

Which tank it fits

Nano60 cm · 65 litres21 of them
Standard90 cm · 180 litres60 of them
Wide120 cm · 300 litres100 of them
Living room180 cm · 650 litres216 of them
Showcase250 cm · 1,200 litres400 of them
Gallery300 cm · 1,440 litres480 of them

Who it lives with

Gets along66 species

and 42 more species

Caution18 species

Narrow shared temperature range

Not together15 species

Water temperatures do not overlap

Aggressive with peaceful

These two do not get along

In the wild

Water type: Freshwater
Climate zone: Tropical
Habitat: On the bottom
Aquarium trade: Traded commercially

Conservation status

Classification

OrderAtheriniformes
FamilyMelanotaeniidae
GenusIriatherina
SpeciesIriatherina werneri
Described byMeinken, 1974

In other languages

German: Filigran-Regenbogenfisch
Russian: Ириатерина Вернера
Chinese: 伊島銀漢魚

Quick answers

Threadfin rainbowfish size: how big does it get?: Adults reach about 5 cm. The smallest of the 13 Melanotaeniidae species on LumaReef (Melanotaenia splendida inornata is the largest, 20 cm).
Threadfin rainbowfish tank size: what is the minimum?: A tank at least 60 cm long. In LumaReef that is the Nano tank or larger.
Threadfin rainbowfish water parameters: what does it need?: Temperature 24–29 °C, pH 6.0–7.5, hardness 3–12 °dGH. Close to what most Melanotaeniidae on LumaReef need (23–30 °C).
Threadfin rainbowfish tank mates: what can it live with?: It gets along with 66 of the 99 freshwater species in the catalogue, such as Emperor tetra, Cherry barb, and Cardinal tetra.
Threadfin rainbowfish: alone or in a group?: Keep at least 6 together.
Threadfin rainbowfish and plants: is it plant safe?: Yes, it leaves plants alone.