LEVIATHAN, n. An enormous aquatic animal mentioned by Job. Some suppose it to have been the whale, but [others] maintain with considerable heat that it was a species of gigantic Tadpole (Thaddeus Polandensis) or Polliwig.
Source: The Devil's Dictionary, 1911.
-- Ambrose Bierce, (Jun 24 1842-1914), US journalist, short-story writer; He was a noted wit, satirist and sardonic short story writer who disappeared while covering the Mexican revolution.