Fin's Fish Guide
The Trompet knifefish (Rhamphichthys rostratus) is a freshwater fish of the family Rhamphichthyidae that grows up to 100 cm.
Description
The longnose knifefish is a sand knifefish (Rhamphichthyidae) from South America. The species has an elongate, laterally compressed body with a conspicuously long, tube-shaped snout and a long, continuous anal fin with which it swims forwards and backwards in undulating movements. It generates a weak electric field to navigate in turbid water and find prey. Nocturnally it searches with its snout for bottom invertebrates such as insect larvae. The species is harmless to humans.
Frequently asked questions
How do you recognise the Trompet knifefish?
The Trompet knifefish has an elongate, eel-like body, is mainly brown and shows a vertical stripes pattern. Long tubular snout and a weak electric field; swims forwards and backwards with the anal fin.
Where does the Trompet knifefish live?
The Trompet knifefish lives in fresh water and is mostly found around mixed bottom. South America; rivers.
How big does the Trompet knifefish get?
The Trompet knifefish grows to a maximum of about 100 cm.
Is the Trompet knifefish dangerous to humans?
No, the Trompet knifefish is harmless to humans. None required: this species is harmless to humans.
Is the Trompet knifefish edible?
The Trompet knifefish is rarely eaten.
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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 Trompet knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Trompet knifefish is one of 12,519 species in the app.