Danio flagrans · Northern Glowlight Danio

Overview

Orange-red markings brighten the active, usually peaceful Danio flagrans. Trade labels have referred to its Putao origin. Close relatives look similar, so color alone is unreliable for identification; a slender outline and longer barbels are useful distinguishing features.

Distribution & habitat

Known localities occupy a few streams near Putao in far northern Myanmar, within the upper Ayeyarwaddy drainage. Rocky channels bordered by dense vegetation contain both fast shallows and slower pools. Collections from nearly dry channels as well as cool flowing streams show that local conditions vary.

Aquarium setup

Dark substrate and abundant plants improve the display. Gravel, smooth stones, wood, and attached plants can also form a stream-style aquarium. Maintain good oxygenation and moderate circulation with quieter retreats, ample swimming length, and a tightly sealed cover.

Diet & feeding

Its wild diet is thought to consist mainly of insects and larvae. Captive feeding is generally straightforward: combine small quality dry foods with regular live or frozen items such as Daphnia, Artemia, and bloodworms.

Behaviour & compatibility

Groups of eight to ten or more reduce nervousness and distribute male dominance interactions. Subordinate fish may suffer nipped fins, although this usually remains within the species. Choose peaceful companions with compatible size and water requirements.

Sexual dimorphism

Adult females are somewhat larger, fuller, and less colorful. Male coloration may intensify during courtship.

Breeding

Captive reproduction is unconfirmed. A trial can adapt procedures for a related species: condition adults, introduce one or two pairs to a dim aquarium with fine plants or egg-protecting mesh, and try small cooler-water additions alongside tiny live foods.

If eggs appear, separate the adults and use established sponge filtration. Prepare infusoria-sized food and later Artemia nauplii. Timings established for the related fish should not be assumed to apply here.