Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Cyprinidae
(Minnows or carps) > Acrossocheilinae
Etymology: Onychostoma: Greek, onyx, -ychos = nail + Greek, stoma = mouth (Ref. 45335). More on author: Kottelat.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Asia: Mekong basin in Laos and China.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 23.0 cm SL male/unsexed; (Ref. 27732)
Morphology | Morphometrics
soft rays: 8. Narrow mouth (mouth width 2.0-2.2 times in head width); barbels lacking in adults (usually two pairs of minute barbels present in juveniles less than about 5 cm SL); last simple dorsal ray serrated posteriorly; caudal peduncle 3.0-3.6 times longer than deep (Ref. 27732).
Inhabits clear water, swift flowing streams (Ref. 43281).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M., 2001. Fishes of Laos. WHT Publications Ltd., Colombo 5, Sri Lanka. 198 p. (Ref. 43281)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.7 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (31 of 100) .