Semaeostomeae
Poralia sp.
The flags jellyfish ( Semaeostomeae ) or flags mouth Jellyfish are an order of screen Jellyfish ( Scyphozoa ). You live with about fifty species are pelagic in the upper layers of the oceans.
Appearance
Flags jellyfish have a typical jellyfish shape with a rather flat screen and only small marginal lobes. At its mouth, they carry four flags mentioned long extended edges of the mouth tube. They are very transparent and often have a blue, yellow, green or purple drawing. Since they can often occur in large flocks the sea surface appear colored by them. Flags jellyfish can reach up to more than two meters shield diameter of a few centimeters in some jellyfish from the family Cyaneidae. The cup-shaped polyp generation is two to seven millimeters long.
Families
- Order flags jellyfish ( Semaeostomeae ) Family Cyaneidae Agassiz, 1862 Genus Cyanea Péron & Leseur, 1809 Blue nettle jellyfish ( Cyanea lamarcki )
- Yellow mane jellyfish ( Cyanea capillata )
- Genus Chrysaora Péron & Leseur, 1809
- Genus Pelagia Péron & Leseur, 1809 Luminescent jellyfish ( Pelagia noctiluca )
- Genus Aurelia Péron & Leseur, 1809 Moon Jellyfish ( Aurelia aurita )
- Genus Poralia Vanhoffen, 1902
- Genus Sthenonia Eschscholtz, 1829
- Genus Diplulmaris Maas, 1908
- Genus Disco Medusa Claus, 1877
- Genus Floresca Haeckel, 1880
- Genus Parumbrosa Kishinouye, 1910
- Genus Ulmaris Haeckel, 1880
- Genus Undosa Haeckel, 1880
- Genus Stygiomedusa Russell, 1959 Stygiomedusa gigantea ( Browne, 1910)
- Genus Tiburonia Matsumoto, Raskoff & Lindsay, 2003
- Genus Deepstaria Russell, 1967 Deepstaria enigmatica Russell, 1967
- Genus Stella Medusa Raskoff & Matsumoto, 2004 Stella Medusa window Raskoff & Matsumoto, 2004
Species
Among the flags jellyfish known from the Baltic Sea and North Sea jellyfish ( Aurelia aurita ), the compass jellyfish ( Chrysaora melanaster ), yellow mane jellyfish ( Cyanea capillata ), the luminous jellyfish ( Pelagia noctiluca ) and the Blue nettle jellyfish ( Cyanea lamarckii ).