Periphyllidae

Periphyllidae is a family of jellyfish containing four genera and six species.^[1] The most well-known member of the family, Periphylla periphylla, is usually considered a deep-sea species, but it forms large blooms in surface waters of Norwegian fjords.^[2]

Periphyllidae
Periphylla periphylla, illustration by Ernst Haeckel
Scientific classification
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Scyphozoa
Order:	Coronatae
Family:	Periphyllidae Haeckel, 1880
Genera
Nauphantopsis Pericolpa Periphylla Periphyllopsis

Genera

• Nauphantopsis
  • Nauphantopsis diomedeae Fewkes, 1885
• Pericolpa
  • Pericolpa campana (Haeckel, 1880)
  • Pericolpa quadrigata Haeckel, 1880
• Periphylla
  • Periphylla periphylla (helmet jellyfish) (Péron & Lesueur, 1810)
• Periphyllopsis
  • Periphyllopsis braueri Vanhöffen, 1902
  • Periphyllopsis galatheae Kramp, 1959