Three individuals of red seabream, Pagrus major (Temminck and Schlegel, 1843) (Sparidae), were pur- chased in the fresh fish section of a supermarket in Hi- gashi-Hiroshima, Hiroshima Prefecture, western Ja- pan. These fish were commercially caught in the cen – tral Seto Inland Sea off the coast of the prefecture. One of the fish was found to be infected by a pair of an ovigerous female and a male of cymothoid isopod Ceratothoa verrucosa (Schioedte and Meinert, 1883) in the buccal cavity. This represents the first docu- mented case of C. verrucosa found from red seabream sold at fish stores and supermarkets in Japan.