Danio choprae is a small, active fish from Myanmar with striking orange-yellow bars, perfect for peaceful community tanks of 50 liters or more.
Overview
Danio choprae, commonly known as the glowlight danio, is one of the most visually striking small fish in the Cyprinidae family. This compact species, reaching only 3–4 cm in length, originates from the northern rivers of Myanmar, where it inhabits clear streams and tributaries with moderate current. The defining feature of Danio choprae is its alternating orange-yellow and dark bars running along the body, which produce a characteristic glow under proper lighting — hence the common name.
In my experience, the glowlight danio is one of those fish that truly brings an aquarium to life. In a group of 8–10 individuals, they move constantly through the middle and upper water layers, creating a mesmerizing display. Their lifespan under good conditions is 3–5 years. A peaceful temperament, hardy nature, and compact size make this species an excellent choice for both beginners and experienced nano-aquarium enthusiasts.
Tank Requirements
A group of Danio choprae requires a tank of at least 50 liters. Despite their small size, these fish are highly active and need ample swimming space. Optimal water temperature is 22–28°C, pH 6.0–7.5, and general hardness (GH) 5–12. These relatively broad parameters make them easy to keep.
The tank is best decorated with live plants around the perimeter and background, leaving the central area open for swimming. Vallisneria, cryptocoryne, and Java moss work well. Floating plants help diffuse overhead light and create a sense of security — under these conditions the fish display more vibrant coloration. Moderate flow from the filter is welcome, as glowlight danios naturally inhabit flowing waters. A dark substrate is recommended, as it makes the fish's bars appear especially vivid.
Feeding and Diet
Danio choprae is an omnivorous species that poses no feeding challenges. The staple diet can consist of high-quality flakes or micro-granules designed for small tropical fish. However, to maintain bright coloration and good health, I strongly recommend supplementing regularly with live or frozen foods: brine shrimp, daphnia, bloodworms, and cyclops.
It is best to feed small portions 2–3 times per day. The fish take food primarily from the water surface and mid-water column, rarely descending to the bottom. Make sure all food is consumed within 2–3 minutes to prevent water pollution. A varied diet not only improves the fish's wellbeing but also stimulates more intense bar coloration.
Care and Maintenance
The glowlight danio is a hardy species with a care level of 2 out of 5, making it an excellent choice for beginners. Nevertheless, basic care practices must be followed.
Weekly water changes of 20–25% are essential for maintaining a stable environment. Use a reliable filter that provides both biological and mechanical filtration. Test water parameters regularly — particularly ammonia and nitrites, which should remain at zero. Like other small danios, such as the celestial pearl danio or emerald dwarf danio, Danio choprae is sensitive to sudden parameter swings, so use water of similar temperature and composition during changes.
Monitor the fish closely: fading colors, lethargy, or loss of appetite are the first signs of trouble and call for an immediate check of tank conditions.
Compatibility
Danio choprae is a peaceful schooling species with an aggression rating of 2 out of 5. They should be kept in groups of at least 6, though I recommend 8–10 — in a larger school the fish feel more confident, display natural behaviors, and show more vibrant colors.
Ideal tankmates are other peaceful fish of comparable size. Excellent choices include small rasboras such as chili rasbora, other danio species like zebra danio and blue danio, as well as small pygmy corydoras as bottom dwellers. Peaceful dwarf shrimp also make good companions.
Keeping them with large or aggressive species that may view the small danios as food is strongly discouraged. Also avoid fish with long, flowing fins — the active danios may nip at them.
Breeding
Breeding Danio choprae in the aquarium requires some preparation, with a difficulty rating of 3 out of 5. This species is a typical egg scatterer and shows no parental care.
For spawning, prepare a separate tank of 15–20 liters with a water level of about 15 cm. Cover the bottom with fine-leaved plants (Java moss) or a spawning mesh to protect the eggs from being eaten by the parents. Raise the temperature to 26–28°C, and keep the water soft and slightly acidic. Select a well-fed female with a rounded belly and one or two of the most colorful males.
Spawning usually occurs at dawn. Once the eggs are laid, the adults must be removed immediately — they will readily eat their own eggs. The larvae hatch in 2–3 days and begin free-swimming a couple of days later. First foods should be infusoria, micro-worms, or specialized liquid fry food. After 7–10 days the fry can accept baby brine shrimp. Growth is relatively fast, and by two months the juveniles begin developing the characteristic bars of adult fish.