Back Nannostomus unifasciatus Catalan Nannostomus unifasciatus CEB Nannostomus unifasciatus Spanish Nannostomus unifasciatus Basque مدادماهی تکنواره Persian Nannostomus unifasciatus Dutch Nannostomus unifasciatus Swedish Нанностомус уніфасціатус Ukrainian Nannostomus unifasciatus WAR 單線鉛筆魚 Chinese
| One-lined pencilfish | |
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| Nannostomus unifasciatus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Lebiasinidae |
| Genus: | Nannostomus |
| Species: | N. unifasciatus
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| Binomial name | |
| Nannostomus unifasciatus Steindachner, 1876
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Nannostomus unifasciatus, (from the Greek: nanos = small, and the Latin stomus = relating to the mouth; from the Latin: unifasciatus = one band),[1][2] commonly known as the one-lined pencilfish, is a freshwater species of fish belonging to the genus Nannostomus in the characin family Lebiasinidae. They are popular in the aquarium trade due to their small size, beautiful color pattern, unique swimming posture and relative hardiness.[1] With its long, pencil-shaped profile, its single jet black stripe reminiscent of the graphite core of a pencil, and its eraser-colored caudal fin, this is the species for which the popular name, 'pencilfish', was first coined in the 1920s, later to be applied to all the species of the genus Nannostomus.[1][3][4]
- ^ a b c "Exotic Aquarium Fishes" by Dr. William T. Innes, Innes Publishing Co, Philadelphia, 1935
- ^ "Fish Name Etymology Project: Characiformes. Scharpf & Lazara". The Etyfish Project. Retrieved 11 November 2019.
- ^ "Pencilfishes" by William Vorderwinkler, TFH Publications, Neptune, NJ, 1956
- ^ "Poecilobrycon unifasciatus" by Dr. William T. Innes, "The Aquarium," November 1940. Innes Publishing Co, Philadelphia