Goniocranion arambourgi is an unusual London Clay acanthomorph known from cranial material, but its relationships remain uncertain. The skull is highly specialised and has at times been compared with lampriform-grade fishes. Because that placement is not secure, ecological reconstruction should remain broad: it was a marine teleost with a distinctive reinforced cranium rather than a fish whose precise feeding strategy can confidently be modelled on a living family.

The species is useful chiefly as evidence for the breadth of acanthomorph experimentation in the early Eocene. Three-dimensional preservation reveals skull-roof architecture that would be difficult to interpret from flattened fossils, but the lack of a well-known associated body limits statements about locomotion and habitat.