Taxonomy & naming
Cyphocharax saladensis was described by the German aquarist and ichthyologist Hermann Meinken in 1933. It belongs to the family Curimatidae — the curimatas, a large Neotropical family of small to medium detritivorous characiforms — placed by the Catalog of Fishes (Eschmeyer, California Academy of Sciences) in the genus Cyphocharax, one of the most speciose curimatid genera with several dozen recognised species spread across South America.
A phylogenetic study (published via ResearchGate) treats C. saladensis as the type of a distinct, well-supported clade within Cyphocharax and describes it as occurring into the upper Rio Paraguai basin, alongside a newly described sister species endemic to that same drainage; this reflects the ongoing revision of curimatid relationships rather than any change to C. saladensis's own valid name. The genus name combines Greek kyphos ("hunched" or "humped") with charax (a spiny fish name used broadly across characiforms), a nod to the gently arched dorsal profile typical of the genus; the species epithet saladensis is a locality-derived name, referencing a "Salado" river or stream — a name used for several watercourses across the species' Argentine and southern Brazilian range.
Morphology
Cyphocharax saladensis is a small, laterally compressed curimatid with the typical genus silhouette: a moderately deep body, a small, subterminal, downturned mouth adapted for grazing surfaces rather than seizing prey, and a single row of small, fine teeth suited to scraping rather than biting. FishBase records a maximum published size of 4 in total length and a maximum weight of around 11.7 g — a genuinely small fish even by the modest standards of minor characins, and far removed from the piranhas and pacus that dominate this family's public image.
Colouration in curimatids of this type is generally a plain silvery to pale rosy-grey body with little in the way of bold markings, consistent with a fish that relies on shoaling and cover rather than display; detailed colour-pattern descriptions for this specific species were not found in the cached sources, and no reliable account of external sexual dimorphism was located either.
Habitat
The species occurs in the southern La Plata River basin and in coastal river drainages of Rio Grande do Sul and Santa Catarina in southern Brazil, extending into Argentina and the Paraná and Paraguay systems; a phylogenetic source additionally places populations in the upper Rio Paraguai basin. This is a subtropical range rather than a classic equatorial Amazonian one, and FishBase explicitly notes the species as subtropical, which means it experiences a real seasonal temperature swing rather than the constant warmth typical of Amazon lowland habitats.
Cyphocharax saladensis is described as benthopelagic, spending its time near the bottom and in the water column of river channels and associated habitats within these basins. Specific pH, hardness or dissolved-oxygen data for this species were not present in the cached sources, so no numeric water-chemistry range is given here beyond the general expectation for La Plata-basin river fish of moderate, near-neutral conditions and a cooler thermal regime than tropical Amazonian curimatids.
Feeding
FishBase records the species' diet as feeding on detritus, consistent with the broader ecological role of Curimatidae as a family: these fish graze organic sediment, biofilm and associated microfauna from the substrate and submerged surfaces rather than pursuing live prey or plant matter in the way many other characins do. This detritivorous habit is one of the more ecologically important — if unglamorous — feeding strategies among Neotropical river characins, recycling nutrients bound up in bottom sediment back into the food web.
No aquarium feeding data for this species were found in the cached sources. Based on the documented diet and the general husbandry of similar small curimatids in the hobby, a fish with this feeding ecology would be expected to do well on sinking foods, algae- and detritus-based diets and fine particulate matter, but this is inference from the family's known biology rather than a documented account for C. saladensis specifically.
Mating
No courtship or spawning-behaviour data for Cyphocharax saladensis were found in the cached sources. This is a data-sparse species outside of taxonomic and distributional surveys, and the cache's own summary flags breeding as unknown in the aquarium and not achieved commercially. Rather than infer courtship detail from unrelated genera, this account states plainly that the species' mating behaviour has not been documented in the sources available.
Breeding
There is no documented account of Cyphocharax saladensis being bred in aquaria or produced commercially. Many small curimatids and related minor characins in this broader group are egg-scatterers with no parental care, but that mode has not been specifically confirmed for this species in the sources reviewed, so it is not stated as fact here. The honest summary is that breeding biology for C. saladensis is effectively undocumented outside its natural range, and the species has essentially no track record in the aquarium trade to draw husbandry-based inference from either.
In the aquarium
Cyphocharax saladensis is not an established aquarium species — none of the cached sources describe it in a hobbyist or trade context, and it does not appear to be part of the ornamental fish trade. Its modest adult size of under 4 in total length would, in principle, suit a modestly sized planted or river-biotope community aquarium if it were ever available, and its detritivorous habit would make it a useful bottom-and-substrate grazer alongside other small South American characins. Any specific tank-size, filtration or tankmate recommendation would be speculation not grounded in the cache, so none is given here.
Prospective keepers of curimatids more broadly should note that this genus and family are largely absent from mainstream fishkeeping, and any wild-caught specimens that do reach the trade would most likely come as bycatch from mixed South American shipments rather than as a deliberately targeted species.
Conservation
Cyphocharax saladensis has not been formally assessed by the IUCN Red List and is treated here as Not Evaluated. A direct search of the IUCN Red List did not return a species-specific assessment, and none of the other cached sources reported one either. This is a common status for small, geographically limited curimatids that receive taxonomic and distributional attention from ichthyologists but fall outside the resource-intensive formal Red List assessment process.
The species is known from a defined but reasonably broad set of subtropical river basins — the southern La Plata, coastal Rio Grande do Sul and Santa Catarina drainages, and the Paraná, Paraguay and upper Rio Paraguai systems — spanning Brazil, Argentina and Paraguay. These basins face well-documented regional pressures from damming, agricultural runoff and habitat modification, but no source-specific conservation assessment or population-trend data for C. saladensis itself was found in the cache, so no conservation status beyond Not Evaluated is asserted.