The horseface loach (Acantopsis dialuzona), also known as the horsehead or long-nosed loach, is a peaceful, shy bottom-dweller native to the fast-flowing rivers of Southeast Asia. These fish are easily identified by their elongated bodies and unique, horse-like muzzles.
Key Characteristics & Behaviour
Sand Sifting & Burying: They are natural sand sifters, filtering substrate through their gills to find food. They often bury themselves in the sand with only their eyes and noses visible.
Nocturnal Activity: While predominantly active at night, they may venture out during the day if they feel secure.
Defense Mechanism: Like many loaches, they possess retractable, sharp spines beneath their eyes for protection; use caution when netting them to avoid entanglement.
Growth: They can grow up to 22–30 cm (8–12 inches), though they often remain smaller in captivity.
Aquarium Care Requirements
Substrate: A soft, fine sand substrate is mandatory. Gravel or coarse material can cause injury or inhibit their natural sifting behaviour.
Tank Size: A minimum of 150–200 litres (roughly 4 feet in length) is recommended to accommodate their size and social needs.
Water Conditions: They require clean, well-oxygenated water with a moderate flow.
Temperature: 18°C – 28°C (64°F – 82°F).
pH: 6.0 – 7.5.
Diet: Omnivorous scavengers that accept sinking pellets, flakes, and live or frozen foods like bloodworms, daphnia, and brine shrimp.
Tankmates: Best kept in groups of 6 or more with other peaceful community fish like rasboras, tetras, and danios. Avoid aggressive species that might stress them.
Summary of Care Parameters
Parameter Ideal Range
Scientific Name Acantopsis dialuzona
Lifespan 10–12 years
Minimum Tank Size 150 Litres / 40–55 Gallons
Difficulty Level Intermediate (sensitive to water quality)
Breeding Rarely bred in captivity; most are wild-caught
SKU: RBM
