Threadfin Rainbow Male

Overview

The Threadfin Rainbow (Iriatherina werneri) is a graceful, tiny rainbowfish whose males display spectacular elongated dorsal and anal fin filaments. Peaceful and ideal for planted community tanks.

Water Parameters

• Temperature: 22–28°C (72–82°F)
• pH: 6.0–7.5
• Hardness: 4–12 dGH

Tank Setup

• Minimum tank size: 55 litres for 6+
• Decor: Planted with floating cover; they occupy mid-water

Diet

• Base: Micro flake, crushed granules
• Treats: Micro worms, daphnia, frozen brine shrimp
• Note: Small mouth — food must be appropriately sized

Temperament & Tank Mates

• Temperament: Peaceful, calm
• Best companions: Small tetras, rasboras, dwarf shrimp, snails
• Schooling: Minimum 6

Common Issues

• Very small; can be outcompeted for food
• Delicate fins may be nipped by boisterous fish
• Lifespan: 3–5 years