The dusky jawfish (Opistognathus whitehursti) is a species of jawfish native to the western Atlantic Ocean including the Gulf of Mexico and the Caribbean Sea where it is an inhabitant of reefs at depths of from . It can reach a length of TL. This species can also be found in the aquarium trade.
The specific name honours Dr. D. D. Whitehurst, a collector of specimens for the Smithsonian Institution, one of which was the type specimen of this species.