White Cloud Mountain Minnow
Tanichthys albonubes
Min Tank Size
40L
Adult Size
4 cm
Lifespan
5 years
School Size
6+
About
Originally discovered in the mountain streams of southern China near Guangzhou, White Cloud Mountain Minnows were once thought extinct in the wild before additional populations were found. They're named after the White Cloud Mountain where they were first collected, and for a long time they were called 'the poor man's neon tetra' because they were so cheap and easy to find.
That nickname doesn't do them justice. They're genuinely striking fish. A bright iridescent lateral stripe runs from nose to tail, the fins flash red and white at the tips, and the gold and long-fin variants add even more visual options to an already appealing species. Adults reach about 4 cm, making them a true nano fish.
What sets them apart from almost everything else in the hobby is their cold tolerance. They thrive anywhere between 14 and 22 degrees Celsius, which means no heater required in most temperate climates. This makes them ideal for unheated indoor tanks, outdoor tub ponds in summer, or even cool basement setups. They're unfussy about pH across a wide range and handle a variety of hardness levels.
Feed them a varied diet of small dried foods, micro pellets, and the occasional live or frozen treat like daphnia or baby brine shrimp, and they'll color up beautifully. A planted tank with a bit of current suits them well. They're genuinely one of the easiest fish you can keep, and they look good doing it.
Browse community builds featuring this species to see how people style cool-water tanks around them.
Water Parameters
Temperature
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GH
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dKHSwimming Level
Flow Preference
Keeping multiple White Cloud Mountain Minnow together
White Cloud Mountain Minnow are shoaling fish and need company of their own kind. Keep a group of at least 6. Smaller groups leave them stressed, washed-out in color, and prone to hiding.
Compatibility
These fish are excellent community fish as long as you respect their temperature needs. That's the main compatibility filter: don't mix them with anything that wants water above 22 degrees, which rules out most common tropical species like neon tetras, guppies, and corydoras. Good matches include other cool-water species like hillstream loaches, weather loaches, dojo loaches, variatus platies, and rosy barbs. They also pair beautifully with shrimp and snails. Long-fin variants should be kept away from even mildly nippy fish. In an unheated nano tank they're often best kept as a single-species setup or with a couple of compatible bottom dwellers.
Commonly kept with
Species this one is most often paired withCommonly tried but avoid
Often paired, but shouldn't beCare Notes
The most common mistake is keeping them too warm. They can tolerate temperatures up to around 24 degrees for short periods, but sustained heat stresses them, shortens their lifespan, and increases disease susceptibility. A tank that runs warm in summer can become a real problem. Good oxygenation matters more than most people expect since they come from fast, cool mountain streams. They'll accept most small foods but genuinely benefit from variety, and regular water changes keep their colors sharp. Don't skip the school size either; a group of fewer than six will be noticeably shy and dull.
Behavior & Aggression
White Cloud Mountain Minnows are about as peaceful as freshwater fish get. There's no real aggression to speak of between individuals or toward other species. Males do occasionally display to each other with a bit of fin-spreading, but it's more of a courtship and posturing behavior than actual combat. No fin damage results. Keeping a larger group of six or more actually smooths this out even further, as attention gets distributed across the school rather than focused on one individual.
Things to Know
- Long-fin variants are vulnerable to fin nipping from any nippy tankmates.
- Do not house with tropical fish requiring temps above 24C.
- Will breed readily in a group; fry may survive in a planted tank.
- Not a tropical fish, keep in unheated tanks below 22°C.
- Active jumpers, a tight fitting lid is recommended.
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