Centroberyx eocenicus was a berycid teleost represented in the London Clay by sagittal otoliths. Berycids are marine fishes that today include the alfonsinos, many of which occupy deeper shelf and slope waters and feed on smaller fishes and crustaceans. A broadly similar predatory ecology is plausible for the Eocene species, but the London Clay fossils themselves preserve the ear stone rather than the feeding apparatus.

The otolith shows that the berycid lineage was already present in the early Eocene seas of north-western Europe. Its shape is relatively elongate for its height and combines a sharply defined sulcus with distinctive ventral angles, providing a useful record even in the absence of body fossils.