Emmelichthyops atlanticus, the bonnetmouth, is a marine fish species of grunt native to the western Atlantic Ocean, where it occurs from Florida and the Bahamas to northern South America.

[2] Bonnetmouths are generally yellowish-gray, with some blue coloration on the front and silvery-white on the sides.

[3] Found only in the western Atlantic Ocean, bonnetmouths can be seen from southern Florida and the Bahamas to northern South America.

[1] Emmelichthyops atlanticus was first formally described in 1945 by the American ichthyologist Leonard Peter Schultz (1901-1986) with the type locality given as Cat Island in the Bahamas.

At the time of its description this species was thought to be related to Emmelichthys and the two genera are similar.