Lightning Eel is obtained by fishing in the waters around Karazhan in Deadwind Pass, at Frostfire Hot Springs in Winterspring, in the river that seprates Western Plaguelands and Eastern Plaguelands, in Bloodvenom Falls in Felwood, in the Verdantis River and top of the The Twin Colossals in Feralas, within Zul'Gurub, in the Western Plaguelands, off the shores of Isle of Quel'Danas, and also found in rivers & Lake Elune'ara of Moonglade. Used as a quest item for Craftsman's Writ - Lightning Eel to obtain an Insignia of the Crusade or Insignia of the Dawn and +75 Argent Dawn rep.