Taxonomy & naming
Dzihunia ilan was described by the Russian ichthyologist F. A. Turdakov in 1936, placing it in the small genus Dzihunia within the family Nemacheilidae — the stone and brook loaches, by far the largest family in the loach superfamily Cobitoidea. Nemacheilidae has been repeatedly reshuffled by taxonomists over the past century, with many species once lumped into broad catch-all genera like Nemacheilus or Noemacheilus later split out into narrower genera such as Schistura, Triplophysa, Barbatula and small regional genera like Dzihunia. This species has not been the subject of any English-language taxonomic revision that surfaced in research for this profile, and it does not appear in the major online fish databases (FishBase, SeriouslyFish) under its current name.
Given the genus and the era and language of its description, Dzihunia ilan most likely traces to Central Asian or Caucasian ichthyological literature of the Soviet period — a region and a body of work that remains only partially translated and digitized in the West. This profile keeps the currently recognized combination, Dzihunia ilan, and does not attempt to "correct" or reassign it without a documented source.
Morphology
No morphological description, photograph, or measurement data for Dzihunia ilan was found in the sources consulted for this profile. Based on its placement in Nemacheilidae, it can be expected to share the general body plan of the family: an elongate, cylindrical to slightly compressed body, a small subterminal or inferior mouth typically bordered by short barbels, and small or absent scales that leave the skin close to naked — a trait that matters for husbandry, since near-scaleless loaches tend to be sensitive to medication.
Unlike the botiid loaches, Nemacheilidae species do not carry an erectile suborbital spine; that structure is a botiid, not a nemacheilid, feature. Beyond these family-level generalities, no size, coloration, or fin-count data specific to Dzihunia ilan could be confirmed, and none is asserted here.
Habitat
No documented locality, river system, or elevation record for Dzihunia ilan was found. Its genus and the nationality of its 1936 describer point toward Central Asia or the Caucasus, a region where Nemacheilidae is highly diverse and many species are known from only one or a handful of streams. Fish in this family and region typically live in cool-to-cold, clear, fast-flowing, well-oxygenated streams and rivers, often over gravel, stone or sand substrates in foothill and mountain drainages.
Because no specific water body, country, or ecoregion could be confirmed for this species in the sources checked, this profile does not assign one. That gap is itself informative: it marks Dzihunia ilan as a genuinely data-sparse, likely narrow-range stream endemic rather than a widespread or well-studied fish.
Feeding
No feeding data specific to Dzihunia ilan was found. Nemacheilid stone and brook loaches as a family are bottom-foraging micro-predators, picking small aquatic invertebrates — insect larvae, small crustaceans and worms — from among gravel and stones in flowing water. It is reasonable to expect this species to feed similarly, but no direct observation or literature record confirms it, and this profile does not present that expectation as established fact.
Mating
No information on sexing, courtship, or reproductive behaviour for Dzihunia ilan was found in the sources consulted. Nothing here can be said about external dimorphism between the sexes with any confidence; the fish is not known to be kept or observed in the aquarium in any of the hobby sources checked, and no spawning account exists to draw from.
Breeding
Dzihunia ilan has not been documented as bred in the aquarium. Stone and brook loaches of Nemacheilidae are, as a family, egg-scatterers: ripe fish release eggs over gravel and among stones in fast-flowing water, with no parental care, and the great majority of the family's roughly 700-plus species have never been spawned in captivity — most are simply too obscure, too specialized in their flow and water-chemistry needs, or too rarely collected. There is no reason to expect Dzihunia ilan to be an exception, and no cave-guarding, mouthbrooding or other elaborate care behaviour should be assumed of it; that pattern belongs to other fish groups entirely, not to loaches. Data for this species specifically is sparse to nonexistent, and this section is kept brief rather than filled with supposition.
In the aquarium
Dzihunia ilan does not appear to be established, or even documented, in the aquarium hobby. It carries no entry in the major hobbyist reference sites checked for this profile, which strongly suggests it is not imported or traded under this name. As a general rule for small Nemacheilidae from cool Central Asian and Caucasian streams, a keeper attempting a fish like this would want cool, clean, fast-moving, highly oxygenated water rather than a warm, still community setup, plus a gravel or stone substrate and, given the near-scaleless skin typical of the family, cautious, reduced-strength medication if disease treatment is ever needed. None of that is a confirmed requirement for this specific species, only a reasonable extrapolation from its family and likely region — and it should be read as such.
Conservation
Dzihunia ilan has not been evaluated by the IUCN Red List and carries no conservation status here beyond Not Evaluated. Many narrow-range Central Asian and Caucasian stream loaches in Nemacheilidae are known from very limited habitat and have never been formally assessed, so a Not Evaluated status for a species like this is unremarkable rather than reassuring — it reflects an absence of assessment, not a documented absence of risk. Nothing about this species' population trend, threats, or protection status could be confirmed from the sources checked.