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Threadfin Rainbowfish
Threadfin Rainbowfish
Origin
Australia
Habitat Size
20-50 Liters
Water Type
Fresh Water
Water Temperature
24º-28ºC
Cost in India
₹50 - ₹100
Size
1 - 2 inches (Nano)
Diet
Omnivore
by Happy Pet TeamUpdated on 2 Dec 2025
Introduction of the Threadfin Rainbowfish
The Threadfin Rainbowfish (Iriatherina werneri) is a thin, elongated freshwater fish with flowing fins and iridescent colors. The male's dorsal, anal, and caudal fins are longer, while the female has shorter and less vibrant fins. They are elegant, dainty swimmers who add an interesting element to planted tanks.
Characteristics
Temperament
Aggressive
Friendly
Compatibility with other fishes
Not Friendly
Super Friendly
Habitat Size
Small
Large
Threadfin Rainbowfish Habitat Requirements
Initial Setup Cost
₹3,000 - ₹6,000
Water Temperature
24º -28ºC
Water Type
Fresh Water
PH Level
6 - 7.5
Tank Setup
Essential Equipment
Aquarium tank
Water filter
Heater
Light
Substrate
Threadfin Rainbowfish Nutritional Guide
Avg Monthly Expenses
₹50 - ₹ 100
Threadfin Rainbowfish are omnivorous and thrive on a varied diet:
Health & Maintenance of the Threadfin Rainbowfish
Common Health Issues
Fin rot
White spot / ick
Fungus
Bacterial infections
Swim bladder inflammation
Velvet disease (yellowish-brown spots on the skin)
Signs of good health
Active
Bright coloration
Good apetite
Signs of sickness
Loss of appetite
Lethargic behaviour
Dull coloring
Tattered fins
White growths
Threadfin Rainbowfish Common Problems
Prerequisites for a Fish
Adequate tank space
Cleanliness
Effort & commitment
Enriching Environment
Written by
Happy Pet TeamAuthor
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Frequently Asked Questions
What should I feed my Threadfin Rainbowfish?
They thrive on a diet of high-quality flake food, small live or frozen foods, and vegetable matter.
Can Threadfin Rainbowfish live with other fish?
Yes, they are peaceful and do well with other non-aggressive fish species.
How to know whether Threadfin Rainbowfish is healthy?
Healthy Threadfin Rainbowfish are active swimmers, have vibrant coloration, and display a healthy appetite. Regular observation and monitoring of water quality can help maintain their health.