The river blackfish (Gadopsis marmoratus) is a freshwater fish endemic to the temperate waters of south-eastern Australia.

[2] It is found from southern Queensland through to central Victoria, including in the Murray-Darling river system.

[2] River blackfish are elongated with a rounded body, distinct snout and large mouth, and small to moderate sized eyes.

It is an ambush predator that takes crayfish, shrimp, small fish and aquatic insects.

There is an unofficial world record caught by Piotr Pomorski on a WildBait Lure, in Victoria Australia that measured 70 cm in length.

The two-spined blackfish is a more specialised upland inhabitant, and is found in the strongly flowing, cobble-bottomed sub-alpine rivers and streams of northeast Victoria, southeast New South Wales, and the Australian Capital Territory.