Prayidae is a family of marine invertebrates in the order Siphonophorae. They are colonial, and the colonies can superficially resemble jellyfish; although they appear to be a single organism, each specimen is actually a colony of Siphonophora.

The family contains the following subfamilies and genera:

• Subfamily Amphicaryoninae Chun, 1888
  • Genus Amphicaryon Chun, 1888
  • Genus Maresearsia Totton, 1954
• Subfamily Nectopyramidinae Bigelow, 1911
  • Genus Nectadamas Pugh, 1992
  • Genus Nectopyramis Bigelow, 1911
• Subfamily Prayinae Chun, 1885
  • Genus Craseoa Pugh & Harbison, 1987
  • Genus Desmophyes Haeckel, 1888
  • Genus Gymnopraia Haddock, Dunn & Pugh, 2005
  • Genus Lilyopsis Chun, 1885
  • Genus Mistoprayina Pugh & Harbison, 1987
  • Genus Praya Quoy & Gaimard, in de Blainville, 1834
  • Genus Prayola Carré, C. 1969
  • Genus Rosacea Quoy & Gaimard, 1827
  • Genus Stephanophyes Chun, 1888

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