Palpons

:Palpons are modified gastrozooids that function in digestion by regulating the circulation of gastrovascular fluids.

Gonophores

:Gonophores are zooids that are involved in the reproductive processes of the siphonophores.

Pneumatophores

:The presence of pneumatophores characterizes the subgroups Cystonectae and Physonectae. They are gas-filled floats that are located at the anterior end of the colonies in these species. They function to help the colonies maintain their orientation in

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