Knifefish

Knifefish

The Gymnotiformes are a group of teleost bony fishes commonly known as the Neotropical or South American knifefishes. They have long bodies and swim using undulations of their elongated anal fin. Found exclusively in fresh water, these mostly nocturnal fishes are capable of producing electric fields for navigation, communication, and, in the case of the electric eel (Electrophorus electricus), attack and defense. A few species are familiar to the aquarium trade, such as the black ghost knifefish (Apteronotus albifrons), the glass knifefish (Eigenmannia virescens), and the banded knifefish (Gymnotus carapo). The jack-knifefish or spotted drum (Equetus lanceolatus) is a small fish, typically between 6 and 9 inches, that can occasionally be found on coral reefs in the middle western Atlantic Ocean, in the Caribbean, the Gulf of Mexico, Florida and the Bahamas.

Knifefish

Knifefish

Knifefish

Knifefish

Knifefish

Knifefish

Knifefish

Knifefish

Knifefish