Aulopopsis depressifrons was an aulopiform predator from the London Clay. Its skull combines a low cranial roof, strong jaw teeth and a well-developed eye region. These features point to a visually guided fish that captured relatively soft-bodied prey such as smaller fishes, an inference consistent with the ecology of many living aulopiforms rather than direct evidence from preserved stomach contents.

The species is known principally from three-dimensional skull material. Radiating sculpture on the cranial roof and robust teeth show that even closely related London Clay aulopiforms developed distinctive head architecture, while the preserved sclerotic ring indicates a strongly ossified support around the eye.