Topic #11: Polymorphism in Hydrozoa

• Polymorphism is exhibited by Physalia
• Polymorphism

  • exhibits many forms or polyps
• Pneumatophore

  • gas-filled polyp
• Gonozooids

  • reproductive polyp
• Dactylozooids

  • defensive polyp for locating and catching prey
• Gastrozoid

  • digestive polyp
• Phylum: Cnidaria

  Class: Hydrozoa

  Order: Siphonophorae

  Suborder: Cystonectae

  Family: Physaliidae

  Genus: Physalia