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Hockeystick Pencilfish: A Comprehensive Care Guide (Nannostomus eques)

The Hockeystick Pencilfish (Nannostomus eques) is a distinctive freshwater fish known for its unique swimming posture and slender body shape. Native to South America, this species is especially recognizable because it often swims at a noticeable upward angle near the surface of the water.

The name “Hockeystick Pencilfish” comes from the angled black stripe that runs along the body and bends near the tail, resembling the shape of a hockey stick. Their golden body coloration combined with dark markings gives them a subtle but attractive appearance.

Because of their peaceful temperament and unusual swimming style, Hockeystick Pencilfish are a fascinating addition to planted aquariums and South American community tanks.

Natural Habitat and Distribution

Hockeystick Pencilfish originate from South America, particularly within parts of the Amazon basin in Brazil, Peru, and Colombia.

In the wild they are commonly found in:

  • Slow-moving forest streams

  • Blackwater tributaries

  • Flooded forest areas

  • Calm waters with dense vegetation and leaf litter

These habitats often feature soft, acidic water and subdued lighting created by dense forest canopy.

Size

Adult size: approximately 1.5–2 inches (3.5–5 cm)

Hockeystick Pencilfish remain relatively small but slightly larger than some other pencilfish species.

Tank Size

Minimum tank size: 15 gallons
Recommended tank size: 20 gallons or larger

Hockeystick Pencilfish should be kept in groups of at least 6–8 fish, though larger groups often produce more natural behavior.

Providing a longer aquarium allows them to swim comfortably near the surface.

Water Parameters

Hockeystick Pencilfish prefer stable water conditions similar to those found in their natural habitat.

Temperature: 72–80°F
pH: 5.0–7.0
Hardness: soft to moderately soft

Maintaining clean water and performing regular water changes helps keep them healthy.

Aquarium Setup

A planted aquarium with natural elements works very well for Hockeystick Pencilfish.

Recommended tank features include:

  • Dense aquatic plants

  • Floating plants to provide cover and diffuse lighting

  • Driftwood and botanicals

  • Dark substrate

Floating plants are especially beneficial because these fish spend much of their time near the surface.

Diet

Hockeystick Pencilfish are omnivorous micro-predators that feed on tiny foods.

In the aquarium they will accept:

  • High-quality nano pellets

  • Crushed flakes

  • Frozen foods such as baby brine shrimp or daphnia

  • Small live foods

Because they often feed near the surface, floating or slow-sinking foods work well.

Behavior and Temperament

Hockeystick Pencilfish are peaceful fish that display a unique swimming posture.

Typical behaviors include:

  • Swimming at a noticeable upward angle

  • Hovering near the surface of the aquarium

  • Loose group formation rather than tight schooling

Their unusual swimming behavior makes them especially interesting to observe.

Tank Mates

Because of their peaceful nature, Hockeystick Pencilfish work well with other small community fish.

Good tank mates include:

  • Small tetras

  • Rasboras

  • Corydoras

  • Dwarf shrimp

  • Other peaceful nano fish

Avoid large or aggressive fish that may prey on them.

Breeding

Hockeystick Pencilfish are egg-scattering fish that may spawn in well-planted aquariums.

During spawning:

  • Eggs are scattered among plants or moss

  • Adults do not guard the eggs

  • Eggs usually hatch within 24–48 hours

The fry are extremely small and should initially be fed infusoria or powdered fry foods before transitioning to baby brine shrimp.

Fun Facts

  • Hockeystick Pencilfish are known for their distinctive angled swimming posture.

  • The black stripe along their body bends near the tail, creating the “hockey stick” appearance that inspired their common name.

  • They are often found near the surface in calm waters in the wild.

Conclusion

The Hockeystick Pencilfish (Nannostomus eques) is a peaceful and unique fish that adds both beauty and personality to planted aquariums. Their distinctive swimming style, subtle coloration, and calm temperament make them a fascinating species for aquarists who enjoy South American community tanks. With proper care and stable water conditions, Hockeystick Pencilfish can thrive and provide a distinctive presence in freshwater aquariums.

Looking to Add Fish to Your Aquarium?

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Pencilfish (Genus Nannostomus): A Comprehensive Guide

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