Knifefish are fascinating freshwater species known for their elongated, blade-like bodies that resemble a knife. Found mainly in South America, especially the Amazon Basin, they belong to the order Gymnotiformes. Unlike most fish, they swim both forward and backward using undulating movements of their long anal fin. Many knifefish, such as the famous black ghost knifefish, use weak electric fields to navigate, communicate, and detect prey in murky waters. They lack dorsal fins and have poor visi

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