Edit Nannostomus unifasciatus
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Name
Scientific name
Nannostomus unifasciatus
Described by
Authority Steindachner, Year 1876
Family
Lebiasinidae
Common names
One-lined Pencilfish
Photograph credits
All 3 credited
Summary
The one-lined pencilfish, Nannostomus unifasciatus, occurs in the upper Amazon and upper Orinoco basins in Brazil, Bolivia, Colombia and Ve…
Size and aquarium
Maximum size
40mm, standard length
Aquarium size
Minimum length 75 cm, Minimum depth 30 cm
Water
Water conditions
Temperature 23–28°C, pH 4–7
Hardness
1–10dGH
Conductivity
Not recorded
Behaviour
Temperament
Peaceful
Social needs
A shoal or group
Community suitability
Community-safe
Where it lives
Countries, regions, rivers and lakes
Bolivia, Brazil, Colombia, Guyana, Trinidad and Tobago, Venezuela, Amazon, Negro, Orinoco
Writing
Etymology
Nannostomus: from the Latin nannus, meaning 'small', and Greek stoma, meaning 'mouth', in reference to the small mouthparts of member species. unifasciatus: fr…
Distribution
Type locality is given as 'near mouth of Rio Negro, Brazil', but this species is currently accepted to range throughout much of the upper Amazon basin in Brazi…
Habitat
Inhabits sluggish tributaries, small rivers, and swampy zones, especially in areas where aquatic vegetation grows densely or with submerged woody structures an…
Aquarium size
Base dimensions of at least 75 ∗ 30 cm or equivalent are required.
Maintenance
Should ideally be kept in a heavily-planted set-up, preferably with a dark substrate and some patches of floating vegetation around which the fish will tend to…
Water conditions
Not written yet
Diet
A micropredator feeding on tiny invertebrates and other zooplankton in nature. In the aquarium it will accept dried foods of a suitable size but should also be…
Behaviour and compatibility
Very peaceful but does not make an ideal community fish due to its small size and rather timid nature. In a community it's best kept with similarly-sized, peac…
Sexual dimorphism
Adult males are more colourful and usually slimmer than females, and also possess an enlarged anal-fin.
Reproduction
Not thought to have been bred in captivity, with earlier reports all appearing to pertain to the congener N. eques which is known to deposit eggs on the unders…
Notes
This species has been referred to the genera Poecilobrycon and Nannobrycon in the past and in the aquarium hobby is also known as 'oneline' or 'red fin' pencil…
References
References
6 on this profile