Polyzoa is a genus of ascidian tunicates in the family Styelidae.

Species within the genus Polyzoa include:

• Polyzoa atlantica Sanamyan et al., 2009
• Polyzoa exigua Kott, 1990
• Polyzoa insularis Millar, 1967
• Polyzoa minor Monniot, 1970
• Polyzoa nodosa Kott, 1990
• Polyzoa opuntia Lesson, 1830
• Polyzoa pacifica Tokioka, 1951
• Polyzoa translucida Ritter & Forsyth, 1917
• Polyzoa vesiculiphora Tokioka, 1951
• Polyzoa violacea (Oka, 1915)

Species names currently considered to be synonyms:

• Polyzoa coccinea (Cunningham, 1871): synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa depressa (Oka, 1926): synonym of Polyzoa violacea (Oka, 1915)
• Polyzoa falclandica Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa falklandica Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa gordiana Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa herdmani Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa lennoxensis Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa pictonis Michaelsen, 1900: synonym of Polyzoa opuntia Lesson, 1830
• Polyzoa reticulata (Herdman, 1886): synonym of Chorizocormus reticulatus Herdman, 1886
• Polyzoa sagamiana Tokioka, 1953: synonym of Polyzoa violacea (Oka, 1915)

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