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Dwarf pencilfish (Nannostomus marginatus) — Lebiasinidae

Dwarf pencilfish

Nannostomus marginatus
Family: Lebiasinidae
LC · Least Concern

The Dwarf pencilfish (Nannostomus marginatus) is a freshwater fish of the family Lebiasinidae that grows up to 4 cm.

Length
3.5 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Large groups
Body shape
Torpedo-shaped
Substrate
Mixed bottom
Danger
Harmless
Edibility
Not eaten

Description

The dwarf pencilfish is a small pencilfish of the family Lebiasinidae from northern South America. The species grows to only about 3 cm and has an elongate, pencil-shaped body with three black lengthwise bands, alternating with gold and red. It lives in schools in calm, plant-rich streams and pools, often in blackwater. As a small predator it picks small zooplankton, insect larvae and small invertebrates. It is popular in the aquarium hobby and is best kept in groups. The species is harmless to humans.

Frequently asked questions

How do you recognise the Dwarf pencilfish?

The Dwarf pencilfish has a torpedo-shaped body, is mainly yellow-gold and shows a horizontal stripes pattern.

Where does the Dwarf pencilfish live?

The Dwarf pencilfish lives in fresh water and is mostly found around mixed bottom.

How big does the Dwarf pencilfish get?

The Dwarf pencilfish grows to a maximum of about 4 cm.

Is the Dwarf pencilfish dangerous to humans?

No, the Dwarf pencilfish is harmless to humans.

Is the Dwarf pencilfish edible?

The Dwarf pencilfish is not usually eaten.

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All data

Identification

Dutch name
Dwergpotloodvis sourced
English name
Dwarf pencilfish verified
Scientific name
Nannostomus marginatus
Family
Lebiasinidae

Appearance

Size class
Small verified
Max length (cm)
3.5 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Yellow / gold inferred
Pattern
Horizontal stripes inferred
Tail shape
Rounded inferred
Mouth position
Superior (upward) inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
No sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Mixed bottom sourced
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Social behaviour
Large groups inferred
Territorial
No inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred

For anglers

Edibility
Not eaten sourced
Fishing method
Geen doelsoort voor de hengelsport; hooguit incidentele vangst of bruikbaar als aasvisje. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Nannostomus

More from the family Lebiasinidae

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