Taxonomy & naming
Leporinus gomesi was described by Garavello & Santos in 1981 and placed in the family Anostomidae, the headstanders, within the order Characiformes. The genus Leporinus is one of the largest in the family, and the Catalog of Fishes (Eschmeyer, California Academy of Sciences) remains the authority for which of its many nominal species are currently valid — headstander taxonomy has seen revision over the decades as material from previously under-sampled tributaries like the Aripuanã has been described and compared.
The genus name Leporinus derives from the Latin lepus/leporis, "hare," a reference to the protruding, incisor-like front teeth shared across the genus, which suit its grazing habit. The specific epithet gomesi is a Latinized eponym, honouring a person associated with the species' description or collection; the cache and available sources do not give the dedicatee's identity, so that detail is left unstated rather than guessed.
Morphology
FishBase records a maximum published size of 6.5 in standard length for Leporinus gomesi, a modest size within a genus that includes species reaching well over 12 in. Like other headstanders it has the characteristic Leporinus body plan: an elongated, moderately compressed body, a small mouth armed with chisel-like incisors adapted for scraping algae and soft plant tissue from surfaces, and the family's signature oblique swimming posture, holding itself head-down at an angle while grazing rather than swimming level.
Detailed colour pattern and fin-count data for this species are not available in the cache; readers should treat any photograph found online with caution unless it is clearly sourced to a confirmed Aripuanã specimen, since Leporinus species are frequently mis-identified and mis-labelled in the aquarium trade.
Habitat
Leporinus gomesi is endemic to the Aripuanã River basin in the Brazilian Amazon, a major tributary system of the Madeira River. As a South American, Amazon-basin characin it lives in warm freshwater consistent with the region's rivers, though the cache does not report specific pH, hardness or temperature readings for the type locality, so no numeric water-chemistry range is asserted here beyond the general warm, soft-to-neutral conditions typical of Amazonian headstander habitat.
Headstanders in general are found along river margins, over submerged wood, root tangles and stands of aquatic vegetation, where the oblique head-down grazing posture lets them work algae and biofilm off submerged surfaces. Nothing in the available sources suggests L. gomesi departs from that general pattern, but its distribution is narrow and specific to the Aripuanã system rather than the wide, multi-basin range of many characins.
Feeding
Leporinus gomesi is a grazer in the pattern typical of its genus: wild Leporinus consume algae, biofilm, vegetable matter, fallen fruit and seeds, along with small invertebrates such as worms, aquatic insects and shrimp taken opportunistically while grazing. The incisor-like front teeth and oblique feeding posture are built for scraping surfaces rather than for active predation.
No aquarium feeding data specific to L. gomesi exists in the cache — the species does not appear to be established in the trade — but based on genus-wide accounts, a captive diet would need to combine vegetable-based foods (algae wafers, blanched greens, vegetable pellets) with occasional protein such as bloodworm or mysis, mirroring how other Leporinus species are fed where they are kept.
Mating
No species-specific courtship or spawning behaviour has been documented for Leporinus gomesi in the available sources. Headstanders as a family are described as seasonal spawners in the wild, and hobby accounts of the genus mention pairs separating from a group and become noticeably more territorial ahead of spawning, but nothing in the cache confirms this has ever been observed in L. gomesi specifically, in the wild or in captivity.
Breeding
Leporinus gomesi is not known to have been bred in the aquarium. Headstanders in general are egg-scatterers that spawn seasonally among dense weed or vegetation in the wild, releasing eggs with no parental care, and general Leporinus accounts describe the genus as difficult to breed in captivity, with only occasional reports of species spawning on densely planted substrate. Nothing in the cache indicates L. gomesi has been kept or bred by hobbyists at all, so this entry should be read as inference from genus-wide behaviour rather than a documented account of this species.
In the aquarium
There is no evidence in the available sources that Leporinus gomesi is established in the aquarium trade — this is a narrow-range Amazonian endemic known primarily from ichthyological and conservation records rather than from fishkeeping experience. Its recorded maximum size of 6.5 in SL is modest for the genus, but prospective keepers should still take the genus's general reputation seriously: many Leporinus and their headstander relatives are nippy, territorial fish as they mature, prone to harassing slower or longer-finned tankmates, and they are skilled jumpers that require a secure, tight-fitting cover.
If ever kept, a Leporinus of this size would need a spacious, well-covered tank with driftwood and robust plants (soft-leaved species may be grazed or shredded), a vegetable-forward diet supplemented with occasional protein, and either a solitary setup or a large enough group/tankmate selection to dilute its territorial tendencies — general headstander-keeping guidance recommends either one specimen or a true group of eight or more, since small groups tend to be quarrelsome in captivity.
Conservation
The IUCN Red List assessed Leporinus gomesi as Near Threatened in an assessment dated June 19, 2020, reflecting its status as a habitat-restricted endemic of the Aripuanã River basin, a single Amazonian tributary system subject to habitat pressure. As a narrow-range freshwater endemic, it has little buffer against localized threats such as habitat loss, and its status is a useful reminder that most Amazonian tributary endemics are not household names — they are conservation-relevant precisely because so few people know they exist.
The available sources give no indication that L. gomesi is targeted by the aquarium trade or subject to fishing pressure; its main documented threat is habitat loss within its restricted Aripuanã range rather than collection.