What is "muskellonge"

Muskellunge \Mus"kel*lunge\, n. [From the Amer. Indian name.] (Zo["o]l.) A large American pike ( Esox masquinongy formerly Esox nobilior) found in the Great Lakes, and other Northern lakes, and in the St. Lawrence River. It is valued as a food fish. [Written also maskallonge, maskalonge, maskinonge, muskallonge, muskellonge, and muskelunjeh.]