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Glass knifefish (Distocyclus conirostris) — Sternopygidae

Glass knifefish

Distocyclus conirostris
Family: Sternopygidae

The Glass knifefish (Distocyclus conirostris) is a freshwater fish of the family Sternopygidae that grows up to 50 cm.

Length
50 cm
Water
Freshwater
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Mixed bottom
Danger
Harmless
Range
South America: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru and others

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Description

The glass knifefish is a weakly electric knifefish (Sternopygidae) from fresh water of the Amazon and Orinoco basins in South America. The species grows to about 50 cm and has an elongate, rearward-tapering, partly translucent body with a long anal fin along the belly with which it swims forwards and backwards. With a weak electric organ it explores its surroundings at night; the current cannot be felt by humans. It hunts small invertebrates. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Glass knifefish?

The Glass knifefish has an elongate, eel-like body and is mainly silver-grey.

Where does the Glass knifefish live?

The Glass knifefish lives in fresh water and is mostly found around mixed bottom. South America: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru and others

How big does the Glass knifefish get?

The Glass knifefish grows to a maximum of about 50 cm.

Is the Glass knifefish dangerous to humans?

No, the Glass knifefish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

More photos

Glass knifefish (Distocyclus conirostris) — Sternopygidae — 2
Florida Museum of Natural History Ichthyology (CC BY-NC 4.0) via GBIF — UF
Glass knifefish (Distocyclus conirostris) — Sternopygidae — 3
© President and Fellows of Harvard College (CC BY-NC 4.0) via GBIF — MCZ
Fin

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All data

Identification

English name
Glass knifefish sourced
Scientific name
Distocyclus conirostris
Family
Sternopygidae

Appearance

Size class
Large verified
Max length (cm)
50.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Silver / grey sourced
Tail shape
Straight inferred

Habitat & distribution

Water type
Freshwater sourced
Substrate
Mixed bottom sourced
Natural range
South America: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru and others sourced
Origin
Native inferred

Behaviour & biology

Territorial
No inferred
Activity
Nocturnal sourced
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred

For anglers

Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

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

More from the family Sternopygidae

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