
Source: Wikimedia Commons
Acantopsis dialuzona
A slender loach from sandy Southeast Asian rivers, named for its long, horse-like snout. It often buries itself with only its eyes showing and can exceed 20 cm.
The horseface loach, Acantopsis dialuzona, is a cobitid found in Java, Borneo, Sumatra and the Malay Peninsula north to southern Thailand (FishBase). The long-used trade name Acantopsis choirorhynchos is treated by GBIF as a synonym of this species. It reaches 25 cm SL. It lives over sand or fine gravel in clear, fast rivers, sifting mouthfuls of substrate through its gills for insect larvae and small crustaceans. It spends much time buried with only its eyes showing, so a soft sand bottom is essential. The taxonomy of Acantopsis is poorly studied, and fish in the trade may include more than one species, some undescribed. Juveniles are exported in large numbers, and when kept properly the fish is hardy and long-lived. Juveniles are regularly seen in Japanese aquarium shops.
Source: Wikipedia (CC BY-SA 4.0)
The Horseface loach grows to Up to 25 cm SL.
The ideal temperature for the Horseface loach is 25〜28℃.
Origin
Southeast Asia (Java, Borneo, Sumatra, Malay Peninsula to southern Thailand)
Size
Up to 25 cm SL
Temperature
25〜28℃
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
Accepted name: Acantopsis dialuzona Van Hasselt, 1823
Synonyms: Acanthopsis biaculeata Rüppell, 1852, Acanthopsis choerorhynchus (Bleeker, 1854), Acanthopsis choirorhynchos (Bleeker, 1854), Acanthopsis choirorhynchus (Bleeker, 1854), Acantopsis biaculeata Rüppell, 1852, Acantopsis choirorhynchos (Bleeker, 1854), Cobitis choirorhynchos Bleeker, 1854, Cobitis macrorhynchos Bleeker, 1854
Authority databases: GBIF · GBIF · FishBase
Nomenclature follows global taxonomic authority databases.
Not listed in the CITES Appendices (checked on Species+). Not designated under Japan's Invasive Alien Species Act, nor on the Ministry of the Environment's list of invasive alien species. Never release aquarium fish into the wild.
Sources: Species+ (CITES) / FishBase
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Mainly carnivorous (sinking prepared foods, frozen and live foods)
25-28°C, pH 6.0-6.5, up to 10 dH (FishBase). A river fish that needs high oxygen and clean water; weekly changes of 30-50% are recommended.
It burrows, so soft, fine sand is essential; coarse gravel injures it and hinders feeding. It grows beyond 20 cm, so use a long tank and set wood and rocks before adding sand so digging cannot topple them.
Pairs well with upper-water fish such as rasboras and danios. Keep one, or ideally six or more; squabbles happen but injuries are rare.
Sifts sand for insect larvae and small crustaceans. Feed sinking prepared foods plus frozen or live Artemia, Daphnia and bloodworm.
Captive breeding has not been recorded.
Fish sold as A. choirorhynchos may include more than one species, and recommended temperatures vary between sources, so check the seller's water temperature.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Horseface loach is 25〜28℃. Avoid sudden temperature changes and maintain a stable environment.
Horseface loach typically reaches Up to 25 cm SL as an adult. Size may vary depending on care conditions and individual genetics.
Horseface loach feeds on: Mainly carnivorous (sinking prepared foods, frozen and live foods). Aim for a balanced diet with appropriate feeding frequency.
The price of Horseface loach varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 30, 2026