Author Robert Hermann Schomburgk (1804–1865)  
Description
English: Gymnotus electricus
Subject: Electric eel
Tag: Fish
Date 1860
Source/Photographer
English: Schomburgk, R. H. (1860) Fishes of British Guiana, Part II, Naturalist's Library, vol.40, Edinburgh, Scotland: W. H. Lizars
Source: https://commons.wikimedia.org/wiki/File:FMIB_38638_Gymnotus_electricus.jpeg

The electric eel (Electrophorus electricus) is an electric fish, and the only species in its genus. Despite the name, it is not an eel, but rather a knifefish. Electric eels inhabit fresh waters of the Amazon and Orinoco River basins in South America, in floodplains, swamps, creeks, small rivers, and coastal plains. They often live on muddy bottoms in calm or stagnant waters.