Saddleback Loach
Scientific Name: Homaloptera orthogoniata
Common Names: Saddleback Loach, Borneo Lizard Loach
Origin: Borneo (Malaysia & Indonesia)
Size: 7–8 cm
Temperament: Peaceful
Lifespan: 6–8 years
Species Overview
The Saddleback Loach (Homaloptera orthogoniata) is a beautifully patterned hillstream fish known for its elongated body, flattened underside, and distinct dark “saddle” bars across the back. Unlike the more boisterous Yasuhikotakia Saddleback Loach, Homaloptera orthogoniata is a true hillstream grazer—peaceful, shy, and adapted to fast-moving, oxygen-rich waters.
It clings to rocks using modified fins and spends most of its time grazing on biofilm. Best kept in groups of 5+, as they show more natural behaviour and reduced stress in numbers.
Care Sheet
Tank Requirements
Minimum Tank: 75–120 L (group of 5+)
Aquascape:
Smooth river stones, slate, pebbles
Driftwood branches
Surfaces for algae/biofilm growth
Substrate: Sand or fine gravel
Filtration: Very strong — river-style setups preferred
Flow: Strong (powerheads or river manifold recommended)
Lighting: Moderate–bright to promote algae
Oxygenation: Very high
Water Parameters
Temperature: 20–24°C (cooler water essential)
pH: 6.0–7.5
Hardness: 2–10 dGH
Nitrates: <15 ppm
Sensitive to poor water quality or low oxygen
Diet
Primarily biofilm grazers, but will accept prepared foods.
Biofilm & algae (essential)
Repashy (Soilent Green, Super Green)
Sinking micro wafers
Frozen daphnia, cyclops, brine shrimp
Blanched vegetables (spinach, zucchini)
Occasional bloodworms
Avoid: high-protein-only diets — they need constant grazing matter.
Behaviour & Tankmates
Peaceful, shy, bottom-clinging
Best in groups of 5+
Suitable tankmates:
Hillstream loaches (Sewellia, Gastromyzon)
White Cloud Mountain minnows
Danios
Rasboras
Avoid:
Warm-water tropical fish
Large or aggressive species
Slow-moving fancy fish
Breeding
Extremely rare in captivity
No reliable reports of home aquaria breeding
Likely seasonal spawners triggered by monsoon cycles
Sexual dimorphism minimal