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Spotted banded knifefish (Gymnotus maculosus) — Gymnotidae

Spotted banded knifefish

Gymnotus maculosus
Family: Gymnotidae

The Spotted banded knifefish (Gymnotus maculosus) is a freshwater fish of the family Gymnotidae that grows up to 30 cm.

Length
30 cm
Water
Freshwater
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
North America: Costa Rica, Guatemala, Mexico

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Description

The Spotted banded knifefish is a weakly electric knifefish (Gymnotidae) from fresh water of Central America. The species grows to about 30 cm and has an elongate, laterally compressed, brown body with oblique dark bands and a long anal fin along the belly with which it swims smoothly forwards and backwards. As a nocturnal bottom-dweller it explores turbid water with a weak electric field; the current cannot be felt by humans. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Spotted banded knifefish?

The Spotted banded knifefish has an elongate, eel-like body, is mainly brown and shows a vertical stripes pattern.

Where does the Spotted banded knifefish live?

The Spotted banded knifefish lives in fresh water and is mostly found around sand or mud bottom. North America: Costa Rica, Guatemala, Mexico

How big does the Spotted banded knifefish get?

The Spotted banded knifefish grows to a maximum of about 30 cm.

Is the Spotted banded knifefish dangerous to humans?

No, the Spotted banded 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.

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All data

Identification

English name
Spotted banded knifefish sourced
Scientific name
Gymnotus maculosus
Family
Gymnotidae
Other names
Spotted knifefish; Knifefish verified

Appearance

Size class
Medium
Max length (cm)
30 inferred
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Vertical bars sourced
Tail shape
Straight inferred

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
North America: Costa Rica, Guatemala, Mexico 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

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

Same genus Gymnotus

More from the family Gymnotidae

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