The Collaborative International Dictionary of English v.0.48:

Barramundi \Bar`ra*mun"di\, n. [Written also barramunda.]
   [Native name.] (Zool.)
   (a) A remarkable Australian fresh-water ganoid fish of the
       genus Ceratodus.
   (b) An Australian river fish (Osteoglossum Leichhardtii).
       [Webster 1913 Suppl.]