What is the meaning of Barramundi?

A diadromous fish of species Lates calcarifer, of the Centropomidae family, order Perciformes, widely distributed in the Indo-West Pacific; a popular food fish.

Either of two fish, Scleropages leichardti and S. jardinii, of the family Osteoglossidae.

The fish Neoceratodus forsteri of the family Neoceratodontidae; the Australian lungfish.

Source: wiktionary.org