Dercetidae

Stratodus ("layer tooth") is a genus of giant prehistoric aulopiform fish found in Cretaceous-aged marine strata of Kansas, Alabama, Morocco, Israel, Niger, South Dakota, and Jordan. It has also been found in the Tamaguélelt Formation of Mali, dating to the Lower Eocene, indicating that Stratodus survived the Cretaceous-Paleogene extinction event. This sleek fish has an upper jaw filled with multiple rows of tiny teeth and was the largest aulopiform, reaching in length.

Rhynchodercetis (meaning "beaked throat whale") is a genus of prehistoric ray-finned fishes.