Horseface Loach Breeding Guide

Why the horseface loach (Acantopsis) is not bred in aquaria: its reproduction is unrecorded, it is a riverine migratory spawner, and trade stock is wild-caught.

Overview

The horseface loach (Acantopsis, traded under names such as A. choirorhynchos / A. dialuzona) is an elongated sand-dwelling loach of the family Cobitidae, native to flowing river channels in Southeast Asia, where larger forms can exceed 200 mm. It spends much of its time buried in sand with only its eyes protruding. Breeding is rated advanced.

Sexing

Females typically grow considerably larger than males, while males have modified pectoral fins with the first one or two branched rays extended.

Breeding Setup

No reproductive setup can be specified because spawning has not been recorded. For general welfare the species must be provided a soft, sandy substrate, since it spends time completely buried; coarse material may cause stress or self-injury. It also requires a high proportion of dissolved oxygen and some water movement.

Spawning Behavior & Trigger

No spawning behaviour or reproductive trigger has been documented for this species in captivity. Its natural habits as a riverine, seasonally migrating inhabitant indicate that flood-season environmental cues, which cannot be replicated in a tank, are likely involved.

Common Challenges

The combination of unrecorded reproduction and dependence on wild-caught stock means there is no realistic home breeding pathway. Husbandry instead centres on providing a deep, soft sand bed and well-oxygenated, gently flowing water for this burrowing species.