One of the unlockable pets from the puzzle game Insaniquarium. He can electrocute the player's tank, turning their fish into diamonds.
Amp the Electric Eel
Eel
for Eel in Fictional animals by species
Suggested by xylopiano
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)
