Acanthozoon is a genus of polyclad flatworms belonging to the family Pseudocerotidae.

The genus Acanthozoon is physically characterized by a dorsal side with small raised papillae and ruffled edges.

Because of their papillated upper surface, they are easily confused with species from the genus Thysanozoon, which are also endowed with dorsal papillae.

However Acanthozoon possess only a single male copulative organ contrary to Thysanozoon.

[2] This genus live in warm tropical marine waters.