Caeus is an extinct genus of prehistoric marine ray-finned fish, closely related to the modern milkfish.

It contains a single species, C. leopoldi from the Early Cretaceous of the Pietraroja Plattenkalk, Italy.

[2] It is one of the largest teleosts known from the Pietraroja formation, and is known by only a single specimen.

It is thought to be phylogenetically intermediate between Parachanos and Dastilbe.

[3][4][5] This article about a prehistoric ray-finned fish is a stub.