Cercoid larvae of tapeworms representing the order Tetraphyllidea (7 distinct forms) and the family Tetrabothriidae (1 form) were found in the intestines of Antarctic bony fishes. These forms differ from one other in morphology and geographical distribution. Cercoids with bilocular bothridia lacking accessory suckers (2 forms) probably belong to tapeworms of the genera Pseudanthobothrium and Anthobothrium, those with monolocular bothridia with accessory suckers (3 forms) to the genus Phyllobothrium, while those with trilocular bothridia may belong to the species Oncobothrium antarcticum Wojciechowska, 1990. One form with undivided bothridia with accessory suckers and hook-like projections probably belongs to an unreported species of the genus Dinobothrium. The last form lacking bothridia seems to be a cercoid of the family Tetrabothriidae.
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