Gymnotiformes
Quick Summary
The order Gymnotiformes, commonly known as knifefish, encompasses about 50 species of Central and South American freshwater fish. These fish are characterized by their elongated, flattened bodies and a long anal fin that enables them to swim both forward and backward.
Knifefish possess the unique ability to generate weak electrical discharges. This electric field is used for navigation and detecting objects, which is particularly useful in murky waters or at night. Some species, like the electric eel, can produce stronger shocks for defense.12
These fish are typically nocturnal and can be carnivorous or herbivorous. While some species are kept in home aquariums, they are generally not of significant commercial importance.1
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