Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Danionidae
(Danios) > Danioninae
Etymology: Microdevario: From the Greek 'mikros' meaning small and the generic name Devario, alluding to the small size and its relationship with Devario.; nanus: Specific name from the Latin word 'nanus' = dwarf (Ref. 38434) More on authors: Kottelat & Witte.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; benthopelagic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Asia: presently known only from Myanmar, but may have a wider distribution in the Irrawaddy delta.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 1.5 cm SL male/unsexed; (Ref. 38434)
In the field, slightly yellow with iridescent blue side and silvery eye and belly; fins translucent with blotch in dorsal fin variably developed; aquarium-kept yellow with iridescent bluish side and silvery-golden eye, belly and opercle. Dorsal fin tip with a black blotch and a fainter one at the tip of the anal fin. Longitudinal scale series 25-26 + 1-2. Predorsal scales 11-13. Branched anal-fin rays 10-11. Dorsal fin rays 3 simple, 7 branched. Pectoral fin slightly falcate, with no axillary lobe. Pelvic fin slightly pointed, 6 rays, 2 axillary scale distinct in largest specimens. Anal fin rays 3 simple, 10-11 branched rays, last one split to the base. Caudal fin with 10 + 9 principal rays, 9 + 8 branched. No lateral line pores. Predorsal scales 11-13 (Ref. 38434).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M. and K.E. Witte, 1999. Two new species of Microrasbora from Thailand and Myanmar, with two new generic names for small Southeast Asian cyprinid fishes (Teleostei: Cyprinidae). J. South Asian Nat. Hist. 4(1):49-56. (Ref. 38434)
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
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00371 - 0.02139), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.0 ±0.3 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.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .