Fin's Fish Guide
The Whale knifefish (Adontosternarchus balaenops) is a freshwater fish of the family Apteronotidae that grows up to 25 cm.
Description
The whale knifefish is a ghost knifefish (Apteronotidae) from fresh water of the Amazon and Orinoco basins of South America. The species grows to about 25 cm and has an elongate, tapering body with a long anal fin and a blunt, whale-like head. 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 Whale knifefish?
The Whale knifefish has an elongate, eel-like body and is mainly brown.
Where does the Whale knifefish live?
The Whale knifefish lives in fresh water and is mostly found around mixed bottom. South America: Brazil, Peru
How big does the Whale knifefish get?
The Whale knifefish grows to a maximum of about 25 cm.
Is the Whale knifefish dangerous to humans?
No, the Whale 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 Adontosternarchus
More from the family Apteronotidae
Want the complete picture on the Whale knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Whale knifefish is one of 12,519 species in the app.