Taxonomy & naming
Indoreonectes neeleshi was described in 2021 by Kumkar, Pise, Gorule, Verma & Kalous, alongside a second new species, I. rajeevi, in a single paper covering two new hillstream loaches of the genus Indoreonectes from the northern Western Ghats of India (Vertebrate Zoology, DOI: 10.3897/vz.71.e62814). The species epithet honours Neelesh Dahanukar, an Indian ichthyologist known for his work on the freshwater fishes of the Western Ghats.
The genus Indoreonectes sits in the family Nemacheilidae — the stone or brook loaches, the largest family within the loach superfamily Cobitoidea, and a group whose generic boundaries have been repeatedly reshuffled as molecular work has split the old catch-all genera Nemacheilus and Noemacheilus. Indoreonectes is itself a relatively small, peninsular-Indian genus, and the authors separated I. neeleshi from its congeners on a combination of morphology and genetic distance — cox1 divergence of 6.8–14.4% and cytb divergence of 5.7–16.2% from other Indoreonectes species. As a species named in 2021, it has not accumulated any synonymy or older combination to correct; the genus placement is current.
Morphology
Indoreonectes neeleshi is a small, elongate stone loach with the diagnostic features typical of its genus: an inner rostral barbel that reaches the middle of the nostril, and a maxillary barbel that reaches about midway between the eye and the posterior edge of the operculum. The body carries a distinct hump behind the nape, and the flanks show dark lateral bars that are wider than the pale spaces between them. Internally it has 35 total vertebrae, with the dorsal fin inserting between the 13th and 14th abdominal vertebrae — the kind of meristic detail that separates it from its close relatives on paper more than in the field.
As a nemacheilid it shares the family's general body plan: a small, near-scaleless, torpedo-shaped fish suited to holding position in fast water, with a flattened underside and a mouth adapted for picking food off stone and gravel. No maximum length has been reported for this species in the description literature available; like most of its genus it is presumed to stay small, in keeping with other Indoreonectes and related Western Ghats stone loaches. The near-absence of scales, typical of the family, makes it — like other nemacheilids — likely to be sensitive to medication, though this has not been specifically tested for I. neeleshi.
Habitat
The species is known only from its type locality: a tributary of the Mula River, part of the Godavari river system, in the northern Western Ghats of Maharashtra, India. The type stream is a fast-flowing, clear hill stream running over a rocky substrate — classic hillstream-loach habitat, with cool-to-moderate temperatures, strong current and high dissolved oxygen sustained by the turbulence of the flow.
The genus Indoreonectes as a whole is endemic to peninsular India south of the Satpura hill ranges, and its member species tend to be narrow-range stream endemics rather than widely distributed fish. No population or water-chemistry data beyond the type description is available for I. neeleshi specifically, and no other localities have been reported, so its habitat should be understood as this single known stream system until further surveys say otherwise.
Feeding
No dietary study exists for Indoreonectes neeleshi specifically, but as a nemacheilid stone loach it is reasonably inferred to follow the family's general pattern: a benthic micro-predator that forages over stone and gravel in fast water, taking small aquatic invertebrates, insect larvae and crustaceans. This is consistent with its mouth and body shape, both built for holding station on the bottom in current rather than grazing algae from rock surfaces the way a hillstream loach in the family Balitoridae would.
Were it ever kept, a diet along these lines — small sinking live or frozen foods such as bloodworm or brine shrimp, plus fine sinking pellets — would suit its likely natural feeding mode. It would be expected to ignore floating flake, as fast-water benthic feeders like this rarely come to the surface.
Mating
There is no published information on sexual dimorphism, courtship or spawning behaviour in Indoreonectes neeleshi. The 2021 description paper is a taxonomic account focused on diagnosing the species from its congeners and does not report reproductive biology or field observations of breeding activity, and no subsequent study has filled that gap.
Given the near-total absence of aquarium history for this species, nothing further can honestly be said here — this is exactly the kind of narrow-range stream endemic where data sparsity, rather than speculation, is the correct default.
Breeding
Indoreonectes neeleshi has no known breeding record, in the wild or in captivity. Stone and brook loaches of the family Nemacheilidae are, as a rule, egg-scatterers that release eggs over gravel and among stones in fast-flowing water with no parental care, and there is no reason to expect this species to differ — but that inference is drawn from the family in general, not from any direct observation of I. neeleshi.
This species has, as far as published sources show, never been bred in the aquarium; it is unlikely to have reached the hobby at all given its restriction to a single known stream in India. The honest summary is data sparse: egg-scatterer over gravel in fast water is the expected mode for a nemacheilid, with no parental care, but this has not been confirmed for I. neeleshi itself.
In the aquarium
Indoreonectes neeleshi is not known to be established in the aquarium trade; there is no care history, no reported tank size, and no husbandry record to draw on. Nothing here should be read as tested advice — it is inference from its genus and family, offered cautiously.
If it were ever kept, the expectation set by other stone and brook loaches from similar Western Ghats hillstream habitat would apply: cool-to-moderate, clean, fast-flowing, well-oxygenated water over a hard substrate of stone and gravel, strong filtration or powerhead-driven current, and a mature biofilm on hardscape surfaces for natural grazing and foraging. As with other near-scaleless nemacheilids, caution with copper-based and full-strength medications would be prudent. Given the total absence of a trade or captive-care record, this section is necessarily speculative and should not be treated as a validated care guide.
Conservation
Indoreonectes neeleshi has not been assessed on the IUCN Red List. As a species described only in 2021, it has not yet gone through formal evaluation, and its status here is recorded honestly as Not Evaluated rather than guessed at.
What is known — that it is restricted to a single tributary stream of the Godavari system in the northern Western Ghats — is itself a conservation-relevant fact: narrow-range stream endemics of this kind are inherently vulnerable to habitat degradation, water abstraction and pollution even before any formal assessment exists. The Western Ghats are a recognised global biodiversity hotspot with mounting pressure on its hill streams from development and land-use change, so a single-locality species like this warrants caution and further survey work, independent of its current unassessed status.