Taxonomy & naming
Enteromius tiekoroi was formally described in 1987 by Lévêque, Teugels, and Thys van den Audenaerde under the original combination Barbus tiekoroi. The species epithet honours the locality or a person associated with the original collection — precise etymology of the epithet is not recorded in publicly available sources. FishBase records the species under the FishBase ID 5315, confirming the current valid combination as Enteromius tiekoroi (Lévêque, Teugels & Thys van den Audenaerde, 1987), with the parenthetical authority marking the transfer out of Barbus.
The genus Enteromius is an expansive grouping used for the majority of small African barbs that do not fall into more tightly circumscribed genera. It is broadly accepted in the ichthyological literature but remains a working arrangement — relationships within African cyprinids are an active area of systematic revision. Anyone encountering the old combination Barbus tiekoroi in older literature or reference databases should treat it as a junior synonym of the current name.
Morphology
Enteromius tiekoroi is a small barb with a maximum recorded length of 3.5 in standard length (SL). FishBase records a complement of 10–11 dorsal soft rays and 8 anal soft rays. The lateral line is complete, and the species possesses two pairs of barbels — a feature shared with many Enteromius but useful for placing it within the barb grade. Fins are described as coloured and the head is relatively long, while the dorsal fin is shorter in relation to body depth; spots on the body are described as small.
Detailed published colour descriptions from original material are not widely reproduced in accessible sources; the combination of coloured fins, small body spots, and a longer-headed profile are the characters flagged in comparative diagnoses. Precise scale counts and lateral-line scale numbers are not available in the cached sources.
Habitat
The species is a freshwater, tropical river fish recorded from the Konkouré and Kolenté rivers in Guinea and the Little Scarcies River in Sierra Leone. These are coastal West African drainages flowing through a region of tropical forest and transitional savanna, discharging into the Atlantic or the Sierra Leone estuary system. The fish occupies the benthopelagic zone — associated with the lower water column and bottom — in riverine environments.
Water chemistry parameters (temperature, pH, hardness) for this species are not available in the sources consulted; West African coastal river systems in this region typically experience warm tropical temperatures year-round with seasonal variation in flow and turbidity linked to the monsoon cycle. The species' restriction to a small cluster of adjacent catchments on the Upper Guinea coast makes it sensitive to any within-basin changes.
Feeding
Dietary information for Enteromius tiekoroi is not documented in the sources available. By analogy with other small Enteromius of similar size and habitat, the species is likely an opportunistic omnivore, foraging near the substrate for small invertebrates, organic detritus, and plant material. This feeding mode is broadly characteristic of small African barbs in riverine environments.
In the aquarium, small barbs in the Enteromius grade generally accept a wide range of prepared and live foods, and there is no reason to expect this species to differ significantly — though it is essentially unknown in the hobby.
Mating
Enteromius tiekoroi, like all barbs, is an egg-scattering, non-guarding spawner. No nest is built, no eggs are brooded, and no parental care is given. Courtship follows the barb pattern: a driving male pursues a gravid female through vegetation or over the substrate, and the pair releases eggs and milt together in brief, close contact. Adhesive eggs fall among plants or onto the riverbed, where they are left entirely to their own fate.
Specific spawning observations for this species in the wild are not documented in available sources. The seasonal hydrology of its West African rivers — with pronounced wet-season flooding — likely acts as a spawning cue, as is typical of African riverine barbs that use rising water levels and temperature shifts to synchronise reproduction.
Breeding
No captive breeding records for Enteromius tiekoroi are known from the sources consulted. The species is not established in the aquarium trade. Based on the biology of comparable small Enteromius, a breeding attempt in aquaria would follow standard barb practice: soft, warm, slightly acidic water; dense fine-leaved planting or a spawning mop; prompt removal of adults after spawning to prevent egg predation; and rearing of fry on fine live foods such as infusoria progressing to newly hatched brine shrimp.
Fecundity, incubation period, and larval development times are not available for this species. The small body size — 3.5 in SL maximum — suggests clutch sizes broadly in line with other small West African barbs, but this is inference rather than recorded data.
In the aquarium
Enteromius tiekoroi is not an established aquarium species and is unlikely to be encountered in the trade. It shares the restricted range and limited profile of many small endemic West African barbs that have never entered commercial supply chains. Information on aquarium maintenance requirements is therefore largely inferential.
Based on its habitat in warm tropical West African rivers, it would presumably require water in the tropical range, standard barb-style care with good filtration and current, and a diet of small prepared and live foods. Its small maximum size would make it suitable for a modestly sized species aquarium, but the lack of availability makes practical guidance speculative. Conservation of the wild population in its native rivers is the more pressing consideration.
Conservation
Enteromius tiekoroi is assessed as Near Threatened (NT) on the IUCN Red List. The Near Threatened status reflects the species' restricted natural range — known only from a handful of adjacent river systems on the Upper Guinea coast of West Africa (Konkouré and Kolenté rivers in Guinea, Little Scarcies in Sierra Leone) — which leaves the population inherently vulnerable to localised threats.
The Upper Guinea coastal forests and their river systems face ongoing pressure from deforestation, agricultural expansion, and infrastructure development including hydroelectric projects. The Konkouré River basin in Guinea has been the site of dam construction that alters hydrology and fragments fish populations. Any degradation of water quality or connectivity in these narrow-range catchments could push the species toward Vulnerable status. The absence of this fish from the aquarium trade means there is no captive buffer population. Monitoring of the West African freshwater fish fauna in this region remains limited, and the species' true population trajectory is poorly known.