The Murray river plays host to many species of fish and apart from the regulars such as Murray Cod, Callop, Catfish, Bream, Macquarie, Perch and Redfin, there are a large number of assorted fish which are largely unknown.
For instance there are Gudgeon, Tupong, Freshwater Sunfish, Pigmy Perch, Line-eye Gudgeon, Tcheri or Hairback Herring, Silver Perch, Blackfish, Trout, (both Brown and Rainbow) Carp, Tench and many types of native Trout.
One of the challenges for native fish are the European Carp. If you catch a Carp you cannot return it to the river and will be fined if caught. They are a pest which destroys river quality and fish habitats.
There are limits on what can be caught in each state. Ask your houseboat hire company for more information regarding this and the seasons.