White Cloud Mountain Minnow
Tanichthys albonubes
A peaceful, active and remarkably cold-tolerant schooling fish with a silvery body, golden highlights and a bright lateral stripe — an excellent choice for a cool, planted freshwater aquarium.
Difficulty
Beginner
Min tank size
38 L / 10 gal
Temperament
Peaceful, active
Diet type
Omnivore
Adult size
3–4 cm / 1.2–1.6 in
Lifespan
3–5 years
Water type
Freshwater
White Cloud Mountain Minnow at a glance
| Scientific name | Tanichthys albonubes (Lin, 1932) |
|---|---|
| Former scientific name | None widely used in modern aquarium references |
| Family | Danionidae (danios, rasboras and related minnows) |
| Origin | Southern China, especially the Pearl River drainage, with native populations also reported from northern Vietnam |
| Adult size | About 3–4 cm (1.2–1.6 in) |
| Tank size (min) | 38 L / 10 gal for a small school; a longer 15–20 gal aquarium is better for active groups |
| Temperature | 16–24 °C (60–75 °F), with a cool stable range preferred |
| pH range | 6.0–8.0 |
| Water hardness | Soft to moderately hard; adaptable when acclimated gradually |
| Diet | Omnivore — flakes, micro-pellets, live and frozen foods |
| Temperament | Peaceful, active schooling fish |
| Lifespan | Around 3–5 years with good care |
| Care level | Beginner |
Overview
The White Cloud Mountain Minnow (Tanichthys albonubes) is one of the most popular small cold-tolerant freshwater fish in the aquarium hobby. Its slender body, iridescent lateral stripe, reddish fins and contrasting markings make a school highly visible in a planted aquarium.
Unlike many commonly sold tropical community fish, White Cloud Mountain Minnows do not require warm water. They are naturally associated with cool, clear freshwater habitats and can often be maintained in an unheated aquarium when indoor temperatures remain suitable and stable.
They are active schooling fish, so the aquarium should provide horizontal swimming room, open areas through the middle and plants or hardscape around the edges. Keeping them in a proper group also helps reduce stress and encourages natural social behaviour.
White Cloud Mountain Minnow size & lifespan
How big do White Cloud Mountain Minnows get?
Adult White Cloud Mountain Minnows generally reach about 3–4 cm (1.2–1.6 inches) in length. They remain small enough for nano-style community aquariums, but their active swimming behaviour means a longer tank is preferable to a very small cube.
Females are usually fuller-bodied, especially when carrying eggs. Mature males tend to be slimmer and can show stronger colour and more pronounced fin markings when displaying to females or competing with other males.
How long do White Cloud Mountain Minnows live?
A lifespan of around 3–5 years is a reasonable expectation in a well-maintained aquarium. Good water quality, appropriate temperature, varied nutrition, adequate swimming space and a stable social group all contribute to longevity.
Natural habitat & origin
Tanichthys albonubes was originally described from the White Cloud Mountain area near Guangzhou in southern China. The species is associated with cool freshwater streams and pools and has also been recorded from northern Vietnam.
Wild habitats can contain clear, well-oxygenated water, rocks, gravel, vegetation and areas of gentle flow. Seasonal changes can produce cooler conditions than those found in typical tropical community aquariums.
A planted aquarium with open swimming space, moderate circulation, good oxygenation and shaded areas provides a practical captive environment. Avoid keeping them at unnecessarily high tropical temperatures simply because other community fish require it.
White Cloud Mountain Minnow tank size & requirements
A 10-gallon (38 L) aquarium is a practical minimum for a small school, but a 15- or 20-gallon aquarium is preferable. White Clouds are active swimmers and benefit from horizontal space, especially when kept in groups of eight or more.
Use a secure lid because active minnows can jump when startled. Keep the middle of the aquarium relatively open for schooling while using plants, rocks and wood around the perimeter to provide cover and visual breaks.
How many White Cloud Mountain Minnows in a 5, 10 or 20 gallon tank?
Stock White Cloud Mountain Minnows as a school rather than as individual fish. A 5-gallon aquarium is too restrictive for a comfortable long-term group. A mature 10-gallon tank can work for a small school, while 15- or 20-gallon tanks provide substantially better swimming room and flexibility.
| 5 gal (19 L) | Not recommended for a proper long-term school. The footprint is restrictive for this active species and leaves little room for stable community stocking. |
|---|---|
| 10 gal (38 L) | A practical minimum for a small school of around 6–8 White Cloud Mountain Minnows when the aquarium has adequate horizontal swimming space and mature filtration. |
| 15 gal (57 L) | A very good size for 8–10 White Clouds, especially in a longer aquarium with plants and open swimming areas. |
| 20 gal (75 L) | Ideal for a larger school and a peaceful coldwater community. The extra swimming length lets the fish display more natural schooling behaviour. |
| 29 gal (110 L) | Excellent for a large school together with compatible cool-water community fish, with plenty of room for plants, rocks and open swimming space. |
Water parameters
| Temperature | 16–24 °C (60–75 °F); they tolerate cool water and often do not require a heater in suitable indoor conditions |
|---|---|
| pH | 6.0–8.0 |
| Hardness (GH) | Soft to moderately hard water; stability is more important than chasing an exact number |
| Filtration turnover | Moderate circulation with good oxygenation and calmer areas for resting |
White Cloud Mountain Minnows appreciate good filtration and oxygenation but do not need a powerful current throughout the entire aquarium. Moderate circulation with calmer areas works well. Keep the aquarium biologically mature and perform regular partial water changes to maintain stable conditions.
Plants such as Java fern, Anubias, Vallisneria, Cryptocoryne and floating plants can provide cover while leaving open swimming lanes. A darker substrate can also make their iridescent stripe and reddish fins stand out.
Not sure how many litres your tank actually holds? Check it with the aquarium volume calculator.
What do White Cloud Mountain Minnows eat? Diet & feeding
White Cloud Mountain Minnows are omnivores and readily accept a variety of aquarium foods. A quality small flake, micro-pellet or appropriately sized granule can form the daily staple.
Useful supplemental foods include daphnia, brine shrimp, cyclops and other small frozen or live foods. A varied diet helps maintain growth, colour and breeding condition.
Feed small portions once or twice daily. Give only what the school can consume within a few minutes so uneaten food does not unnecessarily pollute the aquarium.
White Cloud Mountain Minnow tank mates & compatibility
White Cloud Mountain Minnows are peaceful community fish, but their cool-water preference is an important part of choosing tank mates. Select similarly peaceful species that can thrive in the same temperature range rather than simply choosing any small tropical community fish.
Keep at least six White Clouds together, with eight to twelve or more preferred when the aquarium has enough swimming space. A larger group usually produces more natural, confident schooling behaviour.
Good White Cloud Mountain Minnow tank mates
- Other White Cloud Mountain Minnows
- Zebra danios and other peaceful cool-water danios
- Medaka / Japanese rice fish
- Hillstream loaches in mature, well-oxygenated aquariums
- Weather loaches where aquarium size and temperature are appropriate
- Peaceful cold-tolerant barbs of compatible size
- Amano shrimp in suitable community setups
- Nerite and other compatible freshwater snails
- Other similarly sized peaceful cool-water fish
Avoid
- Large predatory fish
- Aggressive or territorial cichlids
- Warm-water tropical fish that require substantially higher temperatures
- Very large catfish or bottom predators
- Fast, aggressive feeding competitors
- Fin-nipping species
- Fish requiring substantially different water chemistry or temperature
How to breed White Cloud Mountain Minnows
White Cloud Mountain Minnows are egg-laying fish and can spawn readily in mature aquariums. They are egg scatterers rather than fish that attach a carefully guarded clutch to a single broad leaf.
Condition adults with a varied diet containing live or frozen foods. Provide fine-leaved plants, moss, spawning mops or other suitable surfaces where eggs can fall into cover.
Spawning may occur repeatedly when adults are in good condition. If the goal is to raise fry, use a dedicated breeding setup or protect eggs from the adults because adult minnows may eat eggs and newly hatched young.
The fry are very small and need appropriately sized first foods. Once they are large enough, baby brine shrimp and other small foods can support rapid juvenile growth.
Naming confusion & buyer’s notes
White Cloud Mountain Minnows are sometimes sold under shortened names such as White Clouds or White Cloud Minnows. These names normally refer to Tanichthys albonubes. Checking the scientific name is the safest way to confirm the species when shopping.
Coldwater species
White Clouds are naturally cool-water fish. Their ability to tolerate cooler conditions is one of their defining advantages, so they should not be treated as a standard warm-water tropical species.
Heater often unnecessary
In a suitable indoor environment, a heater may not be necessary. Always consider the actual temperature range of the room and aquarium rather than assuming that unheated is automatically better.
White Cloud vs goldfish
Both can be associated with coolwater aquariums, but they are not automatically good tank mates. Goldfish grow much larger and can eat small minnows, while their waste load and long-term space requirements are very different.
Look for the bright stripe
Healthy White Cloud Mountain Minnows commonly show a distinctive pale or iridescent lateral stripe, reddish fins and contrasting body markings. Colour intensity can vary with mood, lighting and condition.
Buy a school, not individual fish
White Cloud Mountain Minnows are social schooling fish. Purchasing a proper group rather than one or two individuals encourages more natural behaviour and usually results in more confident, active fish.
White Cloud Mountain Minnow FAQ
- How long do White Cloud Mountain Minnows live?
- White Cloud Mountain Minnows commonly live around 3–5 years in a well-maintained aquarium. Stable water quality, good nutrition, a proper school, suitable temperature and low stress all contribute to a longer lifespan.
- How big do White Cloud Mountain Minnows get?
- Adults usually reach around 3–4 cm (1.2–1.6 inches). They are small fish, but their active swimming style means they benefit from a longer aquarium rather than simply a tall aquarium.
- How many White Cloud Mountain Minnows should be kept together?
- Keep at least six together, with eight to ten or more preferable when aquarium size allows. A larger school generally produces more confident and natural schooling behaviour.
- Can White Cloud Mountain Minnows live without a heater?
- Yes. White Cloud Mountain Minnows are notably cold tolerant and can often be kept without a heater when the room and aquarium remain safely within their preferred cool-water range. Avoid sudden temperature swings and prolonged exposure to unsuitable extremes.
- Are White Cloud Mountain Minnows good for beginners?
- Yes. They are hardy, peaceful and adaptable, making them a good beginner schooling fish. Their cool-water tolerance can also make them easier to keep without a heater in appropriate climates.
- Are White Cloud Mountain Minnows aggressive?
- No. They are generally peaceful community fish. Males may display and chase one another briefly, especially around spawning, but this is normal social behaviour rather than serious aggression.
- What do White Cloud Mountain Minnows eat?
- They are omnivores and readily accept quality flakes, small pellets and micro-foods. Daphnia, brine shrimp, cyclops and other appropriately sized frozen or live foods are useful supplements for variety and conditioning.
- What temperature is best for White Cloud Mountain Minnows?
- A cool range around 16–24 °C (60–75 °F) is suitable, with stable conditions preferred. They do not need tropical temperatures and are often kept in unheated aquariums when ambient conditions are appropriate.
- Can White Cloud Mountain Minnows live with goldfish?
- They are sometimes associated with coldwater setups, but goldfish are generally not ideal tank mates. Goldfish become much larger, produce substantial waste and may eat small White Clouds, while their feeding behaviour can also outcompete them.
- How do you breed White Cloud Mountain Minnows?
- They are egg scatterers that can spawn readily in mature planted aquariums. Condition adults with varied foods, provide fine-leaved plants or spawning material, and protect eggs or fry from adults if you want to raise a larger number of young.
- Why are my White Cloud Mountain Minnows hiding?
- Hiding can result from a small group, insufficient cover, overly bright lighting, poor water quality or intimidating tank mates. Increasing the school size and providing plants, rocks and shaded areas usually helps them become more confident.