Longfin Blue Color Danio (Brachydanio Rerio)

Cool, iridescent, and gracefully flowing — the Longfin Blue Danio (Danio rerio var.) combines the classic hardiness and energy of the Zebra Danio with a vivid blue body and dramatically elongated, flowing fins. The longfin gene transforms this beloved fish into an elegant, flowing schooling fish that brings cool colour and graceful movement to any community aquarium.

Overview

Appearance

The Longfin Blue Danio displays a cool blue to teal body with horizontal striping and a beautiful iridescent sheen. The longfin gene extends all fins dramatically — the caudal, dorsal, and anal fins flow gracefully, giving the fish an elegant, veil-tail appearance as it moves through the water. A school of these fish creates a cool, shimmering, flowing display that is both dynamic and visually striking.

Water Parameters & Tank Setup

• Temperature: 64 – 77°F (18 – 25°C)
• pH: 6.5 – 7.5
• General Hardness (GH): 2 – 15 dGH
• Tank Size: Minimum 10 gallons for a school of 6+
• Lighting: Moderate — enhances their blue iridescence
• Plants & Decor: Planted tanks with open swimming space

Diet & Feeding

• Staple: High-quality flake food or micro pellets
• Treats: Baby brine shrimp, daphnia, micro worms, and bloodworms

Feed small amounts 2–3 times daily.

Compatibility

Best kept in groups of 6 or more. Avoid fin-nipping species that may damage their flowing fins. Great tank mates include tetras, rasboras, Corydoras, and livebearers.

The Longfin Blue Danio is a beautiful, easy-going schooling fish that brings cool colour, elegance, and constant movement to any freshwater aquarium. A perfect choice for beginners and community tank enthusiasts alike.