Laos Danio

A silvery Devario with blue-green flank markings and warm red or orange colour in the fins.

A medium-large, active schooling fish. Confirm identification because related Devario from Indochina can appear similar.

Adult females are generally fuller-bodied and slightly larger. Mature males are usually slimmer and show stronger colour, especially during courtship.

Aquarium information for this uncommon species is limited, so conservative husbandry and careful observation are advised. Keep a group of at least 8 in an aquarium at least 100 cm long.

Provide open swimming space, secure cover, efficient filtration, and strong but broken-up water movement. Use plants, wood, and rounded stone around the margins while preserving a clear central swimming area.

Floor area and uninterrupted swimming length matter more than decorative volume alone. Leave broad open lanes and keep hardscape away from the main route used by the school.

Laos Danio is a social, active schooling fish that should be maintained with its own kind. Most chasing is part of normal group interaction, but cramped quarters or a group that is too small can concentrate aggression.

Maintain at least 8, preferably 10 or more. A larger group produces more natural schooling and spreads chasing. Not truly territorial, although males may spar or defend short-lived display positions within the group. Their speed and body mass can make an otherwise peaceful school feel disruptive in a cramped community aquarium.

Choose robust, similarly sized community fish that tolerate the same current, temperature, and open-water activity. Avoid tiny fish, ornamental shrimp, slow long-finned species, and timid tankmates that may be continually displaced or outcompeted.

Keep the water clean and oxygen-rich. Soft to moderately hard water is preferable, with no sudden chemistry changes.

An active danio from Laos that feeds in the upper water. Offer flake and small frozen insects.

Feed small portions once or twice daily. Active danios feed quickly, so check that slower tankmates receive food.

An egg-scattering spawner with no parental care. Condition adults well, then use fine-leaved plants, spawning mops, mesh, or marbles to protect eggs from the adults. Remove the breeders after spawning and raise the fry on infusoria or very fine prepared food before moving to microworms and Artemia nauplii. For uncommon species, keep detailed notes on temperature, timing, adult condition, and fry growth because dependable species-specific aquarium reports may be limited.