Examination of the digestive tracts of 588 blackcheek tonguefish, Symphurus plagiusa, during 1973 and 1974 indicated a primarily benthic feeding habit. Mollusks and various crustaceans were the most common identifiable constituents of the diet during all times of the year in fish of all sizes above postlarvae in both rivers and sounds in Georgia estuaries. Sand grains were present in about half of the fish.