The flathead congoli[1] (Halaphritis platcephala) is a species of marine ray-finned fish, belonging to the family Bovichtidae, the thornfishes or temperate icefishes.

[2] The flathead congoli was first formally described in 2002 by Peter R. Last, Arkady Vladimirovich Balushkin and J. Barry Hutchins with the type locality given as Port Davey, Tasmania.

[3] The name of the genus Halaphritis is a compound of halos meaning "sea" and aphritis which is a name which dates back to Aristotle, who used it for a type of anchovy or whitebait, but the authors used as an allusion to Pseudaphritis, emphasising this species marine habitat compared to the superficially similar congoli (Pseudaphritis urvillii), a predominantly fresh and brackish water species.

[2] The overall colour is dusky shading to paler ventrally with around five wide vague darkish bands along the back and flanks while the fins have pale margins.

[1] The flathead congoli is endemic to southeastern Australia where it is found around Tasmania and off Wilsons Promontory in Victoria.