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Scientific Name Nannostomus marginatus  Eigenmann, 1909
Common Names Dwarf Pencilfish
Zwerg-Ziersalmler (Germany)
Type Locality Maduni Creek, Guyana.
Pronunciation nan oss tow muss. - mar gin ay tuss.
Etymology Latin, nannus = small + Greek, stoma = mouth. 
Hop to next section Species Information
Size 35mm or 1.4" 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: Lower to middle Amazon River, Colombia east of the Andes, Guyana, Peru east of the Andes, Suriname and Venezuela east of the Andes.
Amazon, Lower Amazon (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes) (click on these areas to find other species found there)
Amazon, Upper Amazon (click on these areas to find other species found there)
Guyana Waters (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.
pH 5.8 - 7.5
Temperature 24.0-26.0°C or 75.2-78.8°F (Show species within this range)
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 Annals of the Carnegie Museum v. 6 (no. 1), pp 41.
Registered Keepers There is but a single registered keeper, view all "my fish" data.
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There is but a single record of this fish being seen, view it.
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Last Update 2020 Oct 12 23:08 (species record created: 2012 Feb 19 15:51)