Gymnotus
Gymnotus (jim*nō"tus) , noun
[New Latin, from Greek gymno`s naked + nw^tos the back: compare French gymnote.]
(Zoology) A genus of South American fresh-water fishes, including the Gymnotus electricus, or electric eel. It has a greenish, eel-like body, and is possessed of electric power.
One fearful shock, fearful but momentary, like that from the electric blow of the gymnotus.