Taxonomy & naming
Schistura daubentoni was described by Maurice Kottelat in 1990 in his revision of the Indochinese nemacheiline loaches, a monograph covering the stone-loach faunas of Thailand, Myanmar, Laos, Cambodia and southern Vietnam. Species from this group had historically been indexed under the older, broader genus Nemacheilus (or Noemacheilus); Kottelat's revision — and the taxonomic work that has followed it — split that catch-all genus into a number of narrower ones, with most Southeast Asian stone loaches, including this species, placed in Schistura. The Catalog of Fishes is the authority for the currently valid combination, Schistura daubentoni.
The species belongs to Nemacheilidae, the stone or brook loach family, by far the largest family in the loach superfamily Cobitoidea. Schistura is itself one of the largest genera in the family, with roughly two hundred described species spread across South, Southeast and East Asia — a diversity driven largely by narrow-range stream and river endemics like this one.
Morphology
This is a small loach, reported to reach only about 1.5 in standard length, placing it among the more diminutive members of its genus. The body pattern is distinctive: six broad, dark brown vertical bars cross the sides, a large dark blotch sits at the base of the caudal fin, and a narrow vertical stripe runs across the tail fin itself. The caudal fin carries 8+8 branched rays, and the lateral line is incomplete, ending above the anus rather than running the full length of the body — a detail typical of many Schistura and used in species-level identification.
As in other nemacheilids, Schistura daubentoni lacks true scales over much of the body and carries the small, erectile suborbital spine characteristic of the wider Cobitoidea, though in this genus the spine is far less developed than in the botiid loaches. The near-scaleless skin is worth noting for anyone keeping the species, since it carries the same medication sensitivity seen across the loach group.
Habitat
Schistura daubentoni is native to the middle Mekong drainage: central Laos, northern Cambodia, the Tonlé San, the lower Kong River, and adjacent parts of eastern Thailand. It lives in rivers with sand and gravel bottoms, typically found over gravel in shallow water with moderate current — the classic stone-loach niche of clear, well-oxygenated flowing habitat rather than still or heavily vegetated water.
As an Old-World, mainland Southeast Asian river species, it sits within the broader Mekong basin fauna alongside a great many other narrow-range nemacheilids. No detailed water-chemistry data was located for this species specifically; the surrounding literature and its close relatives point to clear, moderately flowing tropical river water rather than the warm, still blackwater conditions associated with some other Southeast Asian fish groups.
Feeding
The available record for Schistura daubentoni points to a diet of insect larvae, consistent with the typical stone-loach role of a bottom-foraging micro-predator that works sand and gravel for small invertebrates. More broadly, Schistura as a genus are considered omnivorous benthic feeders taking insects, worms, crustaceans and zooplankton picked from the substrate in fast, clear water.
In the aquarium, fish built for this lifestyle generally accept small live and frozen foods — bloodworm, brine shrimp and similar — offered at the bottom, and can be reluctant to compete for food that stays in midwater or floats, since their whole foraging strategy is built around searching the substrate rather than chasing food in open water.
Mating
No specific information on courtship, sexing or spawning behaviour for Schistura daubentoni was found in the sources consulted. This mirrors the situation for most of the genus: the great majority of the roughly two hundred described Schistura are known chiefly from taxonomic collecting and museum material, not from observed reproductive behaviour in the field or in captivity.
What can be said, drawing on the wider pattern seen across Nemacheilidae, is that stone and brook loaches in this family are egg-scatterers rather than nest-builders or mouthbrooders — spawning is not expected to involve courtship display, pairing behaviour or any structured mating ritual beyond release of eggs over open substrate in flowing water.
Breeding
Breeding data for this species is essentially absent from the record. Based on the established pattern for stone and brook loaches (Nemacheilidae) generally, Schistura daubentoni would be expected to scatter eggs over gravel in fast-flowing water, with no parental care of eggs or fry afterward.
This is consistent with the wider honesty this family demands: Nemacheilidae is rarely bred in home aquaria, and most species — this one included — are simply never encountered in the hobby in numbers that would generate breeding reports. There is no cave-guarding, no mouthbrooding and no evidence of any parental investment; if it is ever bred at home, egg-scattering over gravel or stones in current is the expected mode, and it should be treated as a rarely-if-ever-bred, data-sparse species rather than assigned a breeding story it hasn't earned.
In the aquarium
Schistura daubentoni has no dedicated hobbyist care profile in the sources checked, and it does not appear to circulate meaningfully in the aquarium trade — this is a taxonomically documented river endemic, not an established aquarium fish. Anyone who does encounter it should extend the same baseline care used for small Schistura generally: clean, well-oxygenated water with moderate to strong current over a sand-and-gravel substrate, mimicking the shallow gravel-bed river habitat it comes from.
As with other nemacheilids, the near-scaleless skin means caution with copper-based and full-strength medications is warranted. Given its tiny adult size of around 1.5 in, it would need only a modest footprint, but its real requirement — flowing, oxygen-rich water over a hard substrate — is the harder condition to replicate well, and is exactly the kind of setup that is easy to get wrong by defaulting to a warm, still community tank.
Conservation
Schistura daubentoni is assessed by the IUCN as Least Concern. It is known from a reasonably broad stretch of the middle Mekong basin — spanning central Laos, northern Cambodia and eastern Thailand — rather than being confined to a single stream, which likely supports its non-threatened status.
As with much of the Mekong basin's freshwater fauna, the longer-term pressures facing the species are the ones affecting the wider river system: damming, sediment and flow alteration, and habitat degradation across the basin. There is no indication in the available sources of any aquarium-trade collection pressure on this species; it does not appear to be part of the ornamental fish trade.