Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Xenocyprididae
(East Asian minnows)
Etymology: Opsariichthys: Greek, opsarion, -ou = a little portion fish + Greek, ichthys = fish (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
Asia: Ma River, Viet Nam.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 10.5 cm SL male/unsexed; (Ref. 95038); 7.5 cm SL (female)
Morphology | Morphometrics
soft rays: 12 - 13;
Vertebrae: 39 - 41. Pectoral fin with i, 13-14 (modally 13) rays; modally 18 scales on caudal peduncle; 15-18 (modally 15) pre-dorsal scales; 13-15 (modally 14) anterior scales before pelvic origin; rounded tubercles on lower jaw rather small, as 2-3 rows in male; 13 greenish blue cross-bars on the body in male; maxillary never extending to the vertical of midline of orbit in female; snout length about 30% in male; and inter-orbital width about 27-28% in male (Ref. 95038).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Huynh, T.Q. and I.-S. Chen, 2013. A new species of cyprinid fish of genus Opsariichthys from Ky Cung-Bang Giang River basin, Northern Vietnam with notes of the taxonomic status of the genus from Northern Vietnam and Southern China. J. Mar. Sci. Tech. 21(Suppl:)135-145. (Ref. 95038)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00423 - 0.01877), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 3.1 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .