Protohydridae

{{Short description|Family of hydrozoans}}

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Protohydridae is a family of cnidarians belonging to the order Anthoathecata.{{cite web |title=Protohydridae |url=https://www.gbif.org/species/9236 |website=www.gbif.org |access-date=14 June 2021 |language=en}}

Genera:

• Protohydra Greeff, 1869
• Sympagohydra Piraino, Bluhm, Gradinger & Boero, 2008