Physalia physalis anatomy: axes, cormidia, and zooid sizes Performance and Discussion Siphonophores feature loads of functionally certified zooids which can be homologous in order to free-living polyps otherwise medusae 27 (Fig. step one ). Physalia physalis falls under Cystonectae, a great clade that is sis to any or all most other siphonophores 8 . From […]