Threadfin rainbowfish

A delicate fish with thread-like fin extensions and a tiny mouth. Keep it with gentle tank mates and feed fine food.

Threadfin rainbowfish, side view

Care at a glance

Minimum tank20 gallons (76 L)
Temperature73–82°F (23–28°C)
pH6.0–7.5
How manyKeep at least 6 together
Adult size1.5 in (3.8 cm)
Where it livesNear the top
TypeFish

Good tank mates

Possible with care

Do not mix with

Open any pairing to see the reason.

Tank sizes that fit