Panda loach (Yaoshania Pachychilus)

Adorable, rare, and endlessly captivating — the Panda Loach (Yaoshania pachychilus) is one of the most sought-after and visually striking nano loaches in the freshwater hobby. Named for its bold black-and-white panda-like pattern, this tiny gem from the fast-flowing mountain streams of southern China is a prized species for experienced aquarists who appreciate rare and beautiful fish.

Overview

Appearance

The Panda Loach displays a striking pattern of bold black and white bands across the body — the panda-like colouration that makes this species immediately recognizable and highly desirable. Juveniles display the most vivid and contrasting black-and-white pattern, which may soften slightly as the fish matures. The streamlined, slightly flattened body and adhesive underside are perfectly adapted for clinging to rocks in fast-flowing currents.

Water Parameters & Tank Setup

• Temperature: 65 – 75°F (18 – 24°C) — cool, well-oxygenated water essential
• pH: 6.5 – 7.5
• General Hardness (GH): 2 – 12 dGH
• Tank Size: Minimum 20 gallons for a small group
• Substrate: Smooth river pebbles and sand
• Decor: Rocks, driftwood, and strong water flow to replicate their natural mountain stream habitat; well-oxygenated water is critical
• Filtration: Powerful filtration with strong flow; high oxygen levels essential

Diet & Feeding

• Staple: Biofilm and algae grazing; high-quality sinking wafers and algae-based foods
• Treats: Blanched vegetables (zucchini, cucumber), frozen daphnia, and baby brine shrimp
• Note: Primarily a grazer — ensure biofilm growth on rocks and surfaces for natural foraging

Feed small amounts 2–3 times daily.

Compatibility & Tank Mates

Peaceful and social — best kept in groups of 4 or more of their own kind. Suitable tank mates include other cool-water, fast-water species such as hillstream loaches, small danios, and White Cloud Mountain Minnows. Avoid warm-water tropical fish — the Panda Loach requires cooler temperatures than most tropical species.

The Panda Loach is a rare and extraordinary nano fish that brings bold panda patterning and fascinating behaviour to any cool-water aquarium. A true collector’s species for the dedicated and experienced aquarist.