Eocoelopoma curvatum was a more elongate-headed member of the London Clay scombrid radiation. Its jaws carried slender, sharp teeth, indicating a grasping predator of fishes or other soft-bodied nekton. The large ossified eye structures and streamlined cranial proportions suggest an active, visually oriented marine fish, although swimming behaviour cannot be reconstructed directly from the skull alone.

Three-dimensional specimens show fine curved ornament on the frontal bones and a specialised fossa beside the orbit. Compared with the compact head of some congeners, the skull is noticeably longer relative to its width, giving E. curvatum a distinctive cranial profile within this early mackerel-like assemblage.