Glass Knifefish
The Transparent knifefish, or simply the Glass knifefish, loves live black worms, but the species will adapt to frozen foods. In the fish tank, these are marvelous creatures with unique movement. Knifefish are fragile to ship, and please transition slowly to the aquarium; they are sensitive to sudden pH and temperature changes. Please ensure the aquarium is at least 30 gallons. These fish are more active at night, but will use their electrolocation powers to scavenge for food during the day.
Quick Facts
| Scientific Name | Eigenmannia virescens |
|---|---|
| Origin | South America |
| Care Level | Moderate |
| Temperament | Peaceful |
FAQ
What kind of food does the Glass Knifefish prefer?
The Glass Knifefish prefers live black worms, but it will also accept frozen foods.
How should I acclimate the fish when receiving it?
Transition the fish slowly to the aquarium to avoid sudden changes in pH or temperature.
What is the minimum tank size recommended for this species?
At least 30 gallons is recommended.


Sophie Henderson –
The Glass Knifefish is a fascinating addition to my tank. It moves in a very unique way and is active at night. I feed it live black worms occasionally and it seems to enjoy it. I made sure to acclimate it slowly and it has adjusted well after a few weeks.
Sebastian Hemmings –
I was impressed by how active the fish is during the night. It uses its electrolocation to find food even in low light. I keep it in a 30-gallon tank with stable water conditions. It’s peaceful and doesn’t bother other fish.
Diane Skinner –
The fish arrived safely and has been thriving in my aquarium. I followed the acclimation instructions carefully and it hasn’t shown any signs of stress. Its movement is quite mesmerizing and adds a lot of interest to the tank.