Echinochimaera ("prickly chimaera") is an extinct genus of chimaeriform fish, known from the Lower Carboniferous Bear Gulch Limestone in Montana, United States.

The genus' name derives from the Greek εχινό (echino) meaning spiny, and chimaera.

[1] The two known Echinochimaera species lived in the Upper Mississippian (Serpukhovian).

[3] Fossils of the species were found in the Bear Gulch Limestone in Montana, United States.

E. snyderi differs from E. meltoni in fin detail as well as jaw shape and teeth near the front edge of the face rather than a tooth plate, in mature specimens later found its mature size was found to be larger than E.