Gym'nōte or Gym-nō'tus, n.

noun

n. [Gr. γυμνός, naked, and νῶτος, the back; Fr. gymnote.] (Ichth.) A genus of fresh-water fishes, including the Gymnotus electricus, or electric eel, found in South America. It has an eel like body, of olive-green color above, and is possessed of electric power. “One fearful shock, fearful but momentary, like that from the electric blow of the gymnotus.” De Quincey.

An electric eel swims through the water.
Gymnote (*Gymnotus electricus).