Fin's Fish Guide
The Marbled knifefish (Rhamphichthys marmoratus) is a freshwater fish of the family Rhamphichthyidae that grows up to 65 cm.
Description
The marbled knifefish is a weakly electric knifefish (Rhamphichthyidae) from fresh water of the Amazon and Orinoco basins in South America. The species grows to about 65 cm and has an elongate, rearward-tapering, marbled brown body with a long tubular snout and a long anal fin along the belly with which it swims forwards and backwards. As a nocturnal bottom-dweller it explores turbid water with a weak electric organ; the current cannot be felt by humans. It searches for insect larvae and small invertebrates. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Marbled knifefish?
The Marbled knifefish has a snake-like body, is mainly brown and shows a marbled pattern.
Where does the Marbled knifefish live?
The Marbled knifefish lives in fresh water and is mostly found around mixed bottom. South America: Brazil, Peru
How big does the Marbled knifefish get?
The Marbled knifefish grows to a maximum of about 65 cm.
Is the Marbled knifefish dangerous to humans?
No, the Marbled 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 Rhamphichthys
More from the family Rhamphichthyidae
Want the complete picture on the Marbled knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Marbled knifefish is one of 12,519 species in the app.