Microdevario nanus (Kottelat & Witte, 1999)
Microdevario nanus
photo by JJPhoto

Family:  Danionidae (Danios), subfamily: Danioninae
Max. size:  1.52 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater; brackish
Distribution:  Asia: presently known only from Myanmar, but may have a wider distribution in the Irrawaddy delta.
Diagnosis:  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).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 January 2011 Ref. (126983)
Threat to humans:  harmless

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