
Source: Wikimedia Commons
Nannostomus eques
A pencilfish that swims with its snout angled upward, the dark lateral stripe running out into the lower lobe of the tail. Within the genus only this species and N. unifasciatus hold that oblique posture.
Nannostomus eques is a pencilfish of the central and upper Amazon in Brazil, Peru and Colombia. It was described from the Peruvian Amazon above Tabatinga, in Amazonas state, Brazil. FishBase gives 5.0cm TL, pH 5.0-6.0, 5-12 dH and 23-28C, recommending groups of five or more in a tank of 60cm or longer, while Seriously Fish gives 3.5cm SL, 22-28C, pH 4.5-7.5, 1-10 dGH and a base of at least 60 by 30cm. The dark lateral stripe runs out into the lower lobe of the tail, and the fish swims with its snout angled upward, a posture shared within the genus only with N. unifasciatus. It lives in sluggish tributaries, small rivers and swampy zones, and in the lower rio Atabapo in Colombia it was recorded in shallow blackwater, clear, acidic and tea-coloured.
Source: Wikipedia (CC BY-SA 4.0)
The Hockeystick Pencilfish lives 3-5 years.
The Hockeystick Pencilfish grows to About 3.5-5cm.
The ideal temperature for the Hockeystick Pencilfish is 22〜28℃.
Origin
South America (the central and upper Amazon in Brazil, Peru and Colombia)
Lifespan
3-5 years
Sources: Seriously Fish / FishBase
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
About 3.5-5cm
Temperature
22〜28℃
Fine dried foods, live and frozen brine shrimp, Daphnia
Seriously Fish suggests a base of at least 60 by 30cm, about 54 litres at 30cm depth, and FishBase recommends groups of five or more in a tank of 60cm or longer. In a planted tank with a dark substrate, patches of floating vegetation give it somewhere to gather, bodies angled to the surface. Add driftwood branches and dried leaf litter, and filter gently; an air-driven sponge is usually enough.
Seriously Fish gives 22-28C, pH 4.5-7.5 and 1-10 dGH; FishBase points to the acidic side, pH 5.0-6.0 with 5-12 dH at 23-28C. It is a blackwater fish, so hold it in soft, slightly acidic water that does not swing.
Peaceful and small-mouthed, so keep it away from fish that will out-compete it for food or that are simply too large; small South American characins and dwarf cichlids suit it. It settles in a group and gathers beneath floating plants.
FishBase records worms, crustaceans and insects in the wild. In the aquarium it takes dried food of a suitable size, but do not rely on that alone: give daily meals of small live or frozen fare such as brine shrimp and Daphnia.
FishBase records that it is oviparous. The microbes that develop as leaf litter decays serve as a secondary food for fry, and the tannins the leaves release are thought beneficial too.
FishBase lists it as IUCN Least Concern, not on the CITES appendices and harmless to people. Populations of the upper and of the middle and lower rio Negro are separate evolutionary units that do not hybridise even where they meet, so the species as recognised may be a complex of lineages. Better, then, not to mix fish of different origins.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Hockeystick Pencilfish is 22〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Hockeystick Pencilfish is 3-5 years. With proper care and nutrition, they can live a long and healthy life.
Hockeystick Pencilfish typically reaches About 3.5-5cm as an adult. Size may vary depending on care conditions and individual genetics.
Hockeystick Pencilfish feeds on: Fine dried foods, live and frozen brine shrimp, Daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Hockeystick Pencilfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026