Danio sp. 'TW01' · Black-barred Danio

Overview

An active, socially competitive danio, Danio sp. ‘TW01’ has an unresolved identity. It may represent an undescribed species or a geographic form of a known relative. A dark caudal-peduncle marking and the absence of pale body spots are useful trade-identification features.

Distribution & habitat

It was reportedly discovered near coastal Gwa in western Myanmar’s Rakhine State. Regional streams undergo pronounced monsoon changes, becoming deeper and faster during the wet season. This describes the regional setting rather than a detailed measurement of every collection site.

Aquarium setup

Provide a long aquarium with dark substrate and substantial planting. Smooth rocks, gravel, wood, and attached plants offer an alternative stream layout. Combine circulation with quieter retreats and seal the lid against escape.

Diet & feeding

Its natural food probably includes insects and larvae. Captive fish generally accept dry diets, supplemented with small live or frozen foods such as bloodworms, Daphnia, and Artemia.

Behaviour & compatibility

Constant movement and enthusiastic feeding can disturb shy or slow companions despite its generally nonaggressive behavior toward other species. Use robust, similarly sized tankmates in a spacious aquarium. Ten or more helps spread dominance pressure, but monitor subordinates: males spar regularly and the shoal only becomes tight when threatened.

Sexual dimorphism

Males are slimmer and more colorful, with orange outer margins on the pelvic and anal fins. Females have white edging. Dominant males develop the strongest colors.

Breeding

It is described as an egg-scatterer without parental care. A controlled attempt can scale up methods for smaller congeners: condition adults, provide moss, mops, or protective mesh, and introduce one or two pairs. Small cooler-water additions or an evening change may encourage spawning.

Separate adults once eggs appear and protect young with established sponge filtration. The adapted procedure suggests three to seven days of incubation and free swimming another day or two later, with Artemia nauplii or fine fry food. These timings remain guidance from an adapted method rather than a universally verified schedule.