Fin's Fish Guide
The Morse Knifefish (Gymnorhamphichthys hypostomus) is a freshwater fish of the family Rhamphichthyidae that grows up to 22 cm.
Description
The sand knifefish is a weakly electric knifefish (Rhamphichthyidae) from northern South America. The species has an elongate, knife-shaped, translucent body with a long anal fin with which it swims forward and backward in an undulating manner, and a pointed snout. By day it lies buried in the sand; at dusk it emerges and remains active until just before sunrise. With an electric organ it generates a weak field to navigate in the dark and find prey. It feeds on small invertebrates from the sand. The species is harmless to humans.
Frequently asked questions
How do you recognise the Morse Knifefish?
The Morse Knifefish has an elongate, eel-like body, is mainly white and shows a spots pattern. Buries itself in sand during the day; weakly electric; swims by undulating its long anal fin.
Where does the Morse Knifefish live?
The Morse Knifefish lives in fresh water and is mostly found around mixed bottom. Northern South America; sandy bottoms of rivers.
How big does the Morse Knifefish get?
The Morse Knifefish grows to a maximum of about 22 cm.
Is the Morse Knifefish dangerous to humans?
No, the Morse Knifefish is harmless to humans. None required: this species is harmless to humans.
Is the Morse Knifefish edible?
The Morse Knifefish is not usually eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Gymnorhamphichthys
More from the family Rhamphichthyidae
Want the complete picture on the Morse Knifefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Morse Knifefish is one of 12,519 species in the app.