White Cloud Mountain Minnow - Complete Care Guide

The White Cloud Mountain Minnow (Tanichthys albonubes) is one of the few widely-sold aquarium fish that is a genuine coldwater species, not a tropical fish that merely tolerates cooler water. Native to mountain streams near Canton, China, and first collected in 1932 by Tan Kam Fei - a Chinese Boy Scout leader honored in the genus name Tanichthys - it thrives at 60-72°F, comfortably within unheated room temperature across most temperate-climate homes.

Photo: Nicklas Iversen - Wikimedia Commons, CC BY-SA 4.0

Parameter	Value
Adult size	~1.5 in
Temperature	60-72°F (avoid above 74°F)
Minimum tank	10-12 gallons (group of 5)
Sweet-spot tank	20-gallon long
Heater needed	No, in most indoor climates

A Named-in-His-Honor Discovery

Tanichthys albonubes carries its discoverer's name directly in its genus: Tan Kam Fei, a Boy Scout leader, collected the first specimens from streams on White Cloud Mountain (Baiyun Shan) near Canton in 1932 and passed them to a local fisheries research station. The species name follows the same logic - albonubes, Latin for "white cloud," names the mountain where it was found.

Built for Unheated Tanks, Not Tropical Ones

White Cloud Mountain Minnow's native mountain-stream habitat makes it one of the few community fish genuinely suited to a heater-free setup - 60-72°F sits inside normal indoor room temperature for most of the year in temperate climates. The relationship runs the other direction too: sustained heat above 74°F stresses the fish's immune system and shortens its lifespan, so pairing it with tropical fish that need a heated tank works against this species rather than for it.

Small, Active, and Best in a Long Footprint

At 1.5 inches, White Cloud Mountain Minnow suits nano setups from 10-12 gallons for a small group of up to 5. A 20-gallon long tank is considered the sweet spot - the extra horizontal swimming room matches the active, mid-water schooling behavior the species shows once settled in.

Related Guides

• Rosy Barb Care Guide
• Zebra Danio Care Guide
• Neon Tetra Care Guide