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Electric eel skeleton, with the long vertebral column at top, the row of bony rays below. Electric eels have long, stout bodies, being somewhat cylindrical at the front but more flattened towards the tail end. E. electricus can reach 2 m (6 ft 7 in) in length, and 20 kg (44 lb) in weight. The mouth is at the front of the snout, and opens upwards.
The elephantnose fish is a weakly electric fish which generates an electric field with its electric organ, detects small variations in the field with its electroreceptors, and processes the detected signals in the brain to locate nearby objects. [12] Weakly electric fish generate a discharge that is typically less than one volt.
Gymnotiformes and Mormyridae have developed their electric organs and electrosensory systems (ESSs) through convergent evolution. [30] As Arnegard et al. (2005) and Albert and Crampton (2005) show, [ 31 ] [ 32 ] their last common ancestor was roughly 140 to 208 Mya, and at this time they did not possess ESSs.
Active electrolocation is practised by two groups of weakly electric fish, the Gymnotiformes (knifefishes) and the Mormyridae (elephantfishes), and by Gymnarchus niloticus, the African knifefish. An electric fish generates an electric field using an electric organ, modified from muscles in its tail. The field is called weak if it is only enough ...
Electrophorus electricus is the best-known species of electric eel.It is a South American electric fish.Until the discovery of two additional species in 2019, the genus was classified as the monotypic, with this species the only one in the genus. [2]
Gymnotus species are nocturnal and mainly feed on aquatic insects, crustaceans, small fish and other small animals, [9] but may also take plant material. [8] Being electric fish, they generate weak electric fields used for navigation, finding prey and communicating with other individuals of their species.
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