Fin's Fish Guide
The Glass knifefish (Sternopygus astrabes) is a freshwater fish of the family Sternopygidae that grows up to 23 cm.
Description
The glass knifefish is a knifefish (Sternopygidae) from fresh water of northern South America. The species grows to about 23 cm and has an elongate, tapering body with a very long anal fin that provides propulsion in undulating movements. It generates a weak electric field to navigate and hunt in turbid water. As a nocturnal bottom-dweller it searches for insect larvae and 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 brown.
Where does the Glass knifefish live?
The Glass knifefish lives in fresh water and is mostly found around mixed bottom. South America: Brazil, Venezuela
How big does the Glass knifefish get?
The Glass knifefish grows to a maximum of about 23 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.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Sternopygus
More from the family Sternopygidae
Want the complete picture on the Glass knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Glass knifefish is one of 12,519 species in the app.