Mormyridae

Mormyridae is a family of African freshwater fishes, commonly called elephantfishes. Many species produce weak electric discharges and detect electrical signals with specialized sensory organs.

Weakly electric fish: A fish that produces low-voltage electric fields used for sensing or communication. Mormyrids are one of the two major groups of weakly electric fish.
Osteoglossomorpha: A lineage of early-diverging teleost fishes that includes bonytongues and elephantfishes. Mormyridae belongs to this broader branch of ray-finned fishes.
Sensory ecology: The study of how animals use sensory systems to interact with their environments. Mormyrids show how electrical senses function in turbid freshwater habitats.
Gnathonemus petersii: A West and Central African mormyrid commonly called the elephantnose fish. Its elongated chin appendage is a familiar example of mormyrid snout specialization.
Electric organ discharge: An electrical signal generated by specialized cells in an electric organ. Mormyrids produce discharges whose timing and patterns carry sensory and social information.
Mormyroidea: A group of osteoglossomorph fishes comprising elephantfishes and their close relatives, the Gymnarchidae. This superfamily places Mormyridae alongside its closest living fish relatives.
Corollary discharge: A neural signal that informs sensory systems about an animal's own motor commands. Mormyrid brains use this signal to distinguish self-generated discharges from external electric events.
Campylomormyrus rhynchophorus: An African elephantfish species with a notably elongated, tubular snout. Its extreme snout form illustrates the family's striking variation in feeding structures.
Electroreception: The detection of electrical fields by specialized sensory structures. Mormyrids use electroreception to perceive nearby objects and other electric fish.
Gymnarchidae: A family of African freshwater fishes represented by the aba, Gymnarchus niloticus. Gymnarchids are mormyroids but lack the diverse, elongated snouts characteristic of many mormyrids.

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