Periphyllidae is a
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
of
jellyfish
Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella- ...
containing four genera and six species. The most well-known member of the family, ''Periphylla periphylla'', is usually considered a
deep-sea
The deep sea is broadly defined as the ocean depth where light begins to fade, at an approximate depth of 200 metres (656 feet) or the point of transition from continental shelves to continental slopes. Conditions within the deep sea are a combin ...
species, but it forms large blooms in surface waters of Norwegian fjords.
[
]
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
References
Taxa named by Ernst Haeckel
Cnidarian families
Coronatae
{{Scyphozoa-stub