Yes they do. They also have a much larger mouth than this specimen compared to their body size. A warmouth will also have heavy mottling that often appears as horizontal bars on the cheek (absent in this fish). Another thing to check for ID is the opercular margin or "ear". In many sunfish species, this ear has a light edge and is occasionally red in some species (pumpkinseed, red ear, etc. and this is occasionally seen in warmouth). You will notice in the fish in question, it is solid black all the way to the edge. As many have already said, this is a bluegill. Maybe you should consult a field guide.warmouth do have vertical bars bro bro.