Saddleback Loach
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.
 
Key Features
Scientific Name: Homaloptera orthogoniata
Common Names: Saddleback Loach, Borneo Lizard Loach
Origin: Borneo (Malaysia & Indonesia)
Size: 7–8 cm
Lifespan: 6–8 years
 
Care 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
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
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.
 
Temperament
Temperament: Peaceful
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
 
Notes
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.
Extremely rare in captivity
No reliable reports of home aquaria breeding
Likely seasonal spawners triggered by monsoon cycles
Sexual dimorphism minimal