Fin's Fish Guide
The Ghost knifefish (Adontosternarchus sachsi) is a freshwater fish of the family Apteronotidae that grows up to 32 cm.
Description
Sachs' ghost knifefish is an American knifefish (Apteronotidae) from South America. The species has an elongate, knife-shaped body with a very long anal fin running along almost the whole underside; with undulating movements of it the fish swims smoothly forwards and backwards. It generates a weak electric field with which it orients and communicates in turbid water. Nocturnally it hunts insect larvae and small invertebrates. The species is harmless to humans.
Frequently asked questions
How do you recognise the Ghost knifefish?
The Ghost knifefish has an elongate, eel-like body, is mainly brown and shows a plain pattern. Swims forwards and backwards with a long undulating anal fin; weak electric field for orientation.
Where does the Ghost knifefish live?
The Ghost knifefish lives in fresh water and is mostly found around mixed bottom. South America; Amazon and Orinoco basins.
How big does the Ghost knifefish get?
The Ghost knifefish grows to a maximum of about 32 cm.
Is the Ghost knifefish dangerous to humans?
No, the Ghost knifefish is harmless to humans. None required: this species is harmless to humans.
Is the Ghost knifefish edible?
The Ghost knifefish is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Adontosternarchus
More from the family Apteronotidae
Want the complete picture on the Ghost knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Ghost knifefish is one of 12,519 species in the app.
Or scan with your phone