Maccullochella is a genus of large Australian predatory freshwater fish within the family Percichthyidae.

The genus Maccullochella was named after an early Australian fish researcher with the surname McCulloch.

As large, long-lived, top-order predators with delayed sexual maturity and relatively low fecundity (fertility) Maccullochella species are extremely vulnerable to overfishing, siltation and other forms of habitat degradation, and river regulation by dams and weirs that alter river environments and negatively affect spawning and recruitment (survival) of young fish.

There are grave concerns over the future of wild Murray cod now, just as much as there is for all the Maccullochella species.

There are currently four recognized species in this genus:[2][3] The generic name honours the Australian zoologist Allan Riverstone McCulloch (1885-1925) who Whitley succeeded as the Curator of Fishes at the Australian Museum.