Vietnamese White Cloud Care Guide - Aquarium Setup, Diet & Breeding

The Vietnamese White Cloud is a small, elegant cyprinid with a slender body, translucent fins and a striking blue-green sheen along its flanks. A warm golden to coppery line often runs through the body, while the fins may show red, orange and yellow accents that become more intense when the fish is displaying or courting. Its appearance is similar to the better-known White Cloud Mountain Minnow, although this species is generally more delicate-looking and compact.

These active fish spend much of their time in the middle and upper areas of the aquarium, moving in loose groups and frequently investigating their surroundings. Males usually display to one another and to females, spreading their fins and showing stronger colour without being seriously aggressive. Their lively but peaceful nature makes them appealing inhabitants for a calm community aquarium.

In the wild, Vietnamese White Clouds inhabit clear, well-oxygenated streams and small rivers, often in areas with a steady flow, rocky or sandy bottoms and aquatic or marginal vegetation. The water in these habitats can be cooler than that found in many tropical community aquariums, and seasonal changes influence their activity and breeding behaviour.

Tanichthys micagemmae was described from Vietnam and entered the aquarium trade as a distinct relative of Tanichthys albonubes. Wild populations have faced pressure from habitat loss and collection, so responsibly sourced captive-bred fish are a sensible choice for aquarists.

Vietnamese White Clouds are native to central Vietnam, particularly clear, cool freshwater streams and tributaries in the Quang Binh region. They are an Asian freshwater species associated with the drainage systems of the Vietnamese Annamite highlands.

A group should have an aquarium of at least 40 litres, with a footprint around 60 × 30 cm or larger; a longer tank is preferable because these active fish use horizontal swimming space. Use gentle to moderate flow and maintain good oxygenation without creating an overpowering current. A dark sand or fine-gravel substrate, smooth stones, driftwood and dense planting around the sides and back create a natural stream-like setting, while open water at the front and floating plants provide both swimming room and cover. A secure lid is useful because small minnows can jump.

Up to about 2.5 cm (1 inch) in standard length. Females are typically slightly larger and deeper-bodied than males, while males are slimmer and may reach around 2–2.5 cm (0.8–1 inch).

Vietnamese White Clouds are omnivores and benefit from a varied diet of quality small flakes, micro-pellets and suitably sized granules. Supplement these staples with newly hatched brine shrimp, daphnia, mosquito larvae and other small live or frozen foods, along with occasional finely crushed vegetable matter. Offer small portions that the group can finish quickly, as their small mouths and active feeding style are best suited to frequent modest meals rather than large feedings.

Vietnamese White Clouds are peaceful shoaling fish that work well with similarly sized, calm species. Suitable companions include small rasboras, zebra danios, celestial pearl danios, freshwater shrimp, small Corydoras and other peaceful community fish that appreciate relatively cool, well-oxygenated water. Avoid large fish, aggressive species, fin-nippers and boisterous tankmates that may outcompete or intimidate them. They should not be kept with predatory fish or slow, long-finned species likely to be harassed by constant activity.

Vietnamese White Clouds are egg scatterers that can breed readily in mature aquariums. Condition a group with plenty of small live or frozen foods, then provide fine-leaved plants, spawning mops, or moss for the eggs to settle among. Adults may eat the eggs, so remove the parents or transfer the spawning material to a separate container. The eggs generally hatch within a few days, and the tiny fry can be raised on infusoria or other suitably fine foods before moving on to newly hatched brine shrimp.

Males are usually slimmer, more vividly coloured and have more strongly contrasting fin markings, particularly when displaying. Females are fuller through the abdomen, especially when carrying eggs, and tend to appear less intensely coloured.