These fish are recognized for their distinctive elongated, bill-like rostra, a feature they share with modern billfishes such as swordfish and marlins.

These elongated bills served specialized feeding functions, possibly for hunting or slashing through hordes of smaller fishes, much like the behavior seen in modern swordfish.

However, the specific ecological role of Palaeorhynchidae remains a topic of scientific study and debate.

The fossil evidence for Palaeorhynchidae provides more insight on the diversity of marine life during the early Eocene period sheds light on how billfishes evolved over millions of years and how their unique features, such as their bills and body shapes, may have developed in response to their marine environments and prey availability.

The family Palaeorhynchidae ultimately became extinct, but it remains an important part of the history of early billfishes.