Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Cyprinidae
(Minnows or carps) > Danioninae
Etymology: Opsaridium: Greek, opsarion, -ou = a little portion fish (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
Africa: widespread in coastal basins from Cameroon to the Republic of Congo (Ref. 81639). Also in upper tributaries of Lake Chad and Benue River systems (Ref. 51193). Present in the middle (Ref. 26673, 41590, 41594, 45434, 45441, 46861) and upper (Ref. 27609, 45434, 93587) Congo River basin, in the Lukuga up to the Lukuga-Niemba confluence (Ref. 93587).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm TL male/unsexed; (Ref. 2801)
Morphology | Morphometrics
soft rays: 14 - 17. Diagnosis: 7.0-8.5 scales between lateral line and dorsal fin origin; 39-44 scales in lateral line; 3-5.5 scales between lateral line and mid-belly; 2 scales between lateral line and pelvic fin base; 14-16 circumpeduncular scales; 8-12 dark, vertical bars on sides; dorsal fin darkly pigmentated between the rays (Ref. 81639).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Lévêque, C. and J. Daget, 1984. Cyprinidae. p. 217-342. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 2801)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00250 - 0.02102), b=3.06 (2.81 - 3.30), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (23 of 100) .