Marsh knifefish
Rhamphichthys heleios
Embed This Widget
Add the script tag and a data attribute to embed this widget.
<script src="https://cdn.jsdelivr.net/npm/fishfyi-embed@1/dist/embed.min.js" defer></script>
<div data-fishfyi="fish" data-slug="marsh-knifefish"></div>Embed via iframe for maximum compatibility.
<iframe src="https://fishfyi.com/iframe/fish/marsh-knifefish/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://fishfyi.com/fish/marsh-knifefish/Add a dynamic SVG badge to your README or docs.
[](https://fishfyi.com/fish/marsh-knifefish/)Use the native HTML custom element.
<script src="https://cdn.jsdelivr.net/npm/fishfyi-embed@1/dist/embed.min.js" defer></script>
<fishfyi-fish slug="marsh-knifefish"></fishfyi-fish>
Not Evaluated
Freshwater
Max Length
40.0 cm
Family
Physical Description
| Measurement | Value |
|---|---|
| Maximum Length | 40.0 cm |
Habitat & Distribution
Water Type
Freshwater
Taxonomy
| Order | Gymnotiformes (Electric knifefishes) |
| Family | Rhamphichthyidae |
| Species | Rhamphichthys heleios |
Frequently Asked Questions
How big does Marsh knifefish get?
Marsh knifefish can grow up to 40.0 cm long.
What family does Marsh knifefish belong to?
Marsh knifefish (Rhamphichthys heleios) belongs to the family Rhamphichthyidae in the order Gymnotiformes (Electric knifefishes).
Similar Fish
Other species in the Rhamphichthyidae family
Atlantic knifefish
Rhamphichthys atlanticus
NE
Freshwater
Bow knifefish
Rhamphichthys drepanium
NE
Freshwater
Dashed knifefish
Iracema caiana
NE
Freshwater
Drop Knifefish
Gymnorhamphichthys britskii
NE
Freshwater
Glass Knifefish
Gymnorhamphichthys bogardusae
NE
Freshwater
Gymnorhamphichthys petiti
Gymnorhamphichthys petiti
NE
Freshwater
Line knifefish
Rhamphichthys lineatus
NE
Freshwater
Longnose knifefish
Rhamphichthys apurensis
NE
Freshwater
External Databases
Explore More
Fish Rankings
Discover the largest, heaviest, and most exciting fish species
Nature FYI Family
Explore more wildlife and biodiversity encyclopedias