Fireline Danio - Devario Sondhii

A Flash of Fire in Every Tank

The Fireline Danio is a relatively recent arrival to the aquarium hobby, first introduced in 2007, and it has quickly built a devoted following thanks to its striking colouration and lively personality. Native to the clear, fast-moving streams of the Southern Shan States in Myanmar, this slender, active fish features a shimmery silver front half that gives way to a vivid reddish-orange blaze along the lower back half of the body — exactly the look that earned it its name. A bold dark spot sits behind the gill cover, adding a final touch of contrast that makes this fish stand out even in a busy community tank.

Life in the School

Fireline Danios are a natural shoaling species and are best kept in groups of 6 or more, where their schooling behaviour and colour really shine. They are active, energetic swimmers that love swimming against a current, and their constant movement brings a sense of life and energy to any aquascape.

Care at a Glance

• Adult size: up to 4.5 cm (approximately 1.75 inches)
• Minimum tank size: 80 litres (20 gallons)
• Temperature: 20–26°C (68–79°F)
• pH: 6.0–7.5
• Hardness: Soft to moderately hard water
• Keep in groups of 6 or more
• Lifespan: 3–5 years with good care

Tank Setup

A well-oxygenated tank with good water flow suits these fish perfectly, reflecting their natural fast-water habitat. Plenty of plants provide cover and help them feel secure, while open swimming areas give them room to school freely. A tight-fitting lid is essential — Fireline Danios are known jumpers and can clear the surface unexpectedly.

Feeding

Unfussy omnivores that readily accept high-quality flake or micro pellet food as a staple. Supplement regularly with frozen or live foods such as daphnia and bloodworm to enhance their colouration and keep them in top condition.

Compatible With

• Other small danios, rasboras, and tetras
• Corydoras, small loaches, and bottom dwellers
• Dwarf cichlids and gouramis
• Dwarf shrimp — use caution with very small species
• Avoid very slow-moving or long-finned fish that may be stressed by their energy