Smooth, enamel-coated teeth pharyngeal “throat” or molar teeth from a freshwater drum. The equivalent teeth in the black drum (Pogonias cromis) common along the Texas coast were used by the fish to crack oysters and extract the muscular nutrients inside. Concentrations of drum molars, thought to be the remnants of a rattle, have been found at several cemetery sites in the Galveston Bay area. Photo courtesy of the United States Fisheries and Wildlife Services.