Epinephelus bilobatus, commonly known as the twin-spot groper or the frostback rockcod, a species of grouper from the subfamily Epinephelinae. E. bilobatus is known from around northwestern Australia and from West Papua (Indonesia). Found in coral reefs and rocky bottom in depths of 4 to 50 m. It is characterized by its greyish-brown color overall with hexagonal brown spots. The maximum total length is .