One-Lined Pencilfish (Nannostomus unifasciatus)
Fish in the family Lebiasinidae. Moderate care. Freshwater.
Quick facts
Scientific nameNannostomus unifasciatus
FamilyLebiasinidae
Also known asOneline Pencilfish, Unifasciatus Pencil
Care levelModerate
Reef safetyFreshwater
TemperamentPeaceful
Dietomnivore
Adult size2.4 in
Minimum tank size15 gallons
Water parametersTemp 74-82°F, pH 5.0-7.0, GH 1-10 dGH
Appearance
Slim body with a single dark stripe from snout to tail and a black-and-white marked caudal; hangs at an oblique head-up angle.
Difficulty and care for the One-Lined Pencilfish
Moderate
Origin and habitat
South America (Amazon, Negro, and Orinoco basins)
Keeper notes
Peaceful; swims at a marked head-up angle and needs calm tankmates.
Log One-Lined Pencilfish in your reef tank
Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track One-Lined Pencilfish alongside everything else in your reef.
