PisciDex Species Profile
Threadfin Rainbowfish
Delicate small rainbowfish with long male fins, needing gentle tankmates and small foods.
Iriatherina werneri
Melanotaeniidae | Oceania | Northern Australia and New Guinea
Core Requirements
Tank Size
20 gallons minimum
Adult Size
2 inches
Group Size
Group 8+
Bioload
1/10
Water Parameters
Temperature
73-82 F
pH
6-7
Plant Safe
Yes
Invert Safe
Yes
Data Confidence
medium
Temperature note: Recommended and tolerated temperature ranges currently match the primary care profile.
Behavior & Husbandry
Temperament
Peaceful
Aggression
1/10
Diet
Omnivore
Difficulty
Intermediate
Lifespan
4 years
Breeding
Intermediate
Schooling
Yes
Compatibility Tags
CommunityPeacefulSchoolingMid WaterTop WaterPlant SafeInvert Safe
Similar Species
Species Compatibility
Database-driven compatibility notes for planning community aquariums.