Abstract / Introduction / Summary:
A non-ovigerous female of Ceratothoa oxyrrhynchaena Koelbel, 1878 was collected from the buccal cavity of a blackthroat seaperch, Doederleinia berycoides (Hilgendorf, 1879), at 250 m deep on the continental shelf of Suruga Bay, an inlet of the Northwestern Pacific Ocean, central Japan. No male was found in the buccal cavity of the fish examined under a stereo scope. The female collected is briefly described. The present collection of C. oxyrrhynchaena represents its first record from Suruga Bay and the 10th species of cymothoid reported from Shizuoka Prefecture.