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Scientific Name Nannostomus unifasciatus  Steindachner, 1876
Common Names One-line Pencilfish
Dip-tailed Pencilfish, Pfauenaugen-Schrägsteher (Germany), Tail-eye Pencilfish
Type Locality Near mouth of Rio Negro, Brazil.
Pronunciation nan oss tow muss.
Etymology Latin, nannus = small + Greek, stoma = mouth. 
Hop to next section Species Information
Size 38mm or 1.5" SL. Find near, nearer or same sized spp.
Sexing Females, when in good condition, have a fuller body. Males tend to have brighter colours, typically a lot more red in the colouration.
Hop to next section Habitat Information
Distribution South America: Parts of the Amazon basin of Bolivia, Brazil, and probably Colombia; the upper Orinoco basin of Venezuela, and Guyana.
Amazon (click on these areas to find other species found there)
Amazon, Upper Amazon (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2020.
Hop to next section Husbandry Information
Suggested Tankmates Avoid boisterous tankmates, this is a small slow moving species that shoals.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.), pp 127 [79], Pl. 9 (fig. 1)
Registered Keepers There is no registered keeper.
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There is no wish to keep this species.
Spotters Spotted this species somewhere? Click the binoculars!
There is but a single record of this fish being seen, view it.
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Last Update 2013 Jul 20 21:26 (species record created: 2013 Jun 14 16:06)