Taxonomy & naming
Citharinops distichodoides was described by the French ichthyologist Jacques Pellegrin in 1919. It belongs to the family Citharinidae — the citharinids, or "lutefish" — within the order Citharoniformes/Characiformes lineage of African characins, a family distinct from the distichodontids (Distichodus and relatives) despite the superficial resemblance suggested by the species epithet distichodoides, which alludes to a Distichodus-like appearance.
FishBase recognises two subspecies within Citharinops distichodoides: the nominate C. d. distichodoides, found in the Chad and Bénoué basins, and C. d. thomasi, found in the Niger and Volta basins. The genus Citharinops itself is monotypic or near-monotypic, and the species is grouped with the deep-bodied, herbivorous grazers of Citharinus and allied genera that graze algae, detritus and plant material in African river systems. As with much of the older African ichthyological literature, the exact current generic placement should be checked against the Catalog of Fishes for any recent revision; this account keeps the genus as Citharinops per the available record.
Morphology
Citharinops distichodoides is a large, laterally compressed, deep-bodied fish typical of the citharinid grazers, reaching a maximum recorded size of 33 in standard length — a substantial fish by any characin standard, and far larger than the pacus and silver dollars more familiar in the aquarium trade. FishBase assigns it a low trophic level of about 2.0, consistent with a primarily herbivorous, algae-and-plant-grazing diet rather than a predatory or omnivorous one.
Detailed morphological description in accessible literature is limited; the species is best documented through fishery records rather than aquarium-oriented natural-history accounts, so fin counts, colouration details and other fine anatomical points are not confirmed here and are left unstated rather than guessed.
Habitat
The species is native to freshwater river systems across West and Central Africa, recorded from the Chad, Bénoué, Niger and Volta river basins. It is described as a demersal, potamodromous fish of tropical rivers — meaning it lives near the bottom and undertakes seasonal migrations within fresh water, likely tied to the flood pulse typical of these African river systems, rather than migrating to sea.
Specific water chemistry and temperature data for this species were not found in the sources consulted here; broadly, the Chad, Bénoué, Niger and Volta basins are warm tropical African rivers, but precise pH, hardness and temperature figures for C. distichodoides specifically are not documented in the available record and are not stated as fact below.
Feeding
Citharinops distichodoides is a herbivore-leaning grazer. FishBase records a trophic level of about 2.0, placing it among the plant- and algae-feeding characins rather than the omnivorous or predatory groups, consistent with its citharinid family's general grazing ecology on algae, detritus and plant material along riverbeds and banks.
No aquarium feeding data exists for this species, since it is not established in the hobby; any care approach would need to extrapolate cautiously from its wild grazing diet and from the general herbivorous husbandry used for other large citharinids and distichodontids, rather than from any documented feeding trial.
Mating
No courtship or pairing behaviour has been documented for Citharinops distichodoides in the sources available. As a large, commercially fished African river species with essentially no aquarium-keeping history, its reproductive behaviour has not been studied or reported in the literature consulted here, and this account does not speculate on it.
Breeding
Breeding biology for Citharinops distichodoides is not documented. Like many African distichodontids and citharinids, it is presumed — but not confirmed here — to be an egg-scattering river-spawner tied to the seasonal flood cycle typical of the region's fisheries, a pattern known in related genera, but no specific spawning account, egg description or aquarium breeding record exists for this species in the sources reviewed. It is not known to be bred in captivity.
In the aquarium
Citharinops distichodoides is not a hobby aquarium fish. FishBase notes no dedicated aquarium care information exists for the species, and it is documented almost entirely as a commercial fishery resource across its African range rather than as an ornamental fish. Its adult size of 33 in alone would rule it out of all but the largest public-aquarium-scale systems — far beyond any home tank — and there is no established husbandry protocol, water-chemistry target, or tankmate guidance to offer.
Anyone encountering this species outside its native range should treat it as a food-fish species, not an aquarium candidate, and there is no responsible basis here for recommending it be kept.
Conservation
The IUCN Red List assesses Citharinops distichodoides as Least Concern, reflecting its wide distribution across multiple major West and Central African river basins — the Chad, Bénoué, Niger and Volta systems. FishBase separately flags the species with a high vulnerability-to-fishing score (61 out of 100), consistent with its role as a targeted commercial fishery species and its large adult size, both of which make heavily fished populations more sensitive to overexploitation even while the species as a whole remains widespread and not currently threatened.
As with many African riverine food fishes, longer-term pressures such as damming, water abstraction and habitat change across the Chad, Niger and Volta basins are relevant watch items for regional fisheries management, even though they do not currently elevate the species' Red List status.