Purple jellyfish | ©Frédéric Lechat   (Belle-Île, France)

Pelagia noctiluca (Semaeostomeae - Pelagiidae) is a jellyfish found in the Northeastern Atlantic, Mediterranean, Indian Ocean, and western and central Pacific. Sometimes it is commonly named Mauve stinger.

These jellyfishes are beautiful, especially when they phosphoresce. The Mauve stinger glows by producing luminous mucus from surface cells when it is knocked or disturbed by waves.

Unlike most jellyfish, the life cycle of the mauve stinger does not involve a fixed stage.



Purple-Striped Jelly (Chrysaora colorata)

Also known as the purple-striped sea nettle or the mauve stinger, the purple-striped jelly is a species of pelagiid jellyfish that is endemic to waters off the coasts of California. Like other jellyfish C. colorata is pelagic and will feed on a variety of invertebrates that are dispatched via its stinging nematocysts. Occasionally young crabs of the genus Cancer will make their homes in the jellyfish and will eat parasites that attempt to feed on the jelly.


Animalia-Cnidaria-Scyphozoa-Semaeostomeae-Pelagiidae-Chrysaora-C. colorata

Images: Sanjay Acharya and divindk

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Unbelievable. Possibly a jellyfish from the genus Deepstaria, only described since the 60s, and until know only known from fragments:  

Imperfectly known, many specimens damaged. Two nominal species, information from both combined here based on Russell (1967), Larson (1986), Larson et al. (1988). Bell remarkably thin, broad, delicate … flexing down in “pursing” manner… most specimens reported colorless but deep brown … lining a paler brown recorded once (Larson et al., 1988, as Deepstaria reticulum); more observations needed before value of this as species character can be evaluated. 

Purple-striped jelly / パープルストライプドジェリー

Chrysaora colorata

Purple-striped jelly
A species of jellyfish that live off the coast of California.


Animalia Cnidaria Scyphozoa Semaeostomeae Pelagiidae
動物界 刺胞動物門 鉢虫綱 旗口クラゲ目 オキクラゲ科

The photo taken at Enoshima Aquarium, Kanagawa, Japan.

The Lion’s Mane Jellyfish - The largest jellyfish in the Atlantic Ocean

Scientifically named Cyanea capillata (Semaeostomeae - Cyaneidae), this impressive jellyfish is the largest jellyfish in the Atlantic Ocean and one of the largest in the world. 

The Lion’s mane jellyfish generally grows to 30-50 cm in diameter in British waters. However, they have been known to grow up to 2 m, and its tentacles can be up to 60 m long.

Cyanea capillata has a global distribution, although it is mostly found in the northern hemisphere in the North Atlantic, North Pacific and North Sea, as well as around Australia in the south.

References: [1] - [2]

Photo credit: ©Dan Hershman | Locality: Hood Canal, Hoodsport, Washington, US (2006)


"Big Red" (Tiburonia granrojo)

…a species of Ulmarid jellyfish that is the sole member of the subfamily Tiburoniinae. Tiburonia granrojo has been observed in deep waters (around 600 to 1,500 meters) across the Pacific Ocean, including in the Sea of Cortez, Monterey Bay, Hawaii, and Japan. Tiburonia granrojo can grow up to 75 centimeters (30 in) in diameter and in place of the long tentacles found in most other jellyfish it has thick oral arms. Only 23 specimens of Tiburonia granrojo have ever been observed, and only one has been collected (a small [15 cm] specimen) for study. 


Animalia-Cnidaria-Scyphozoa-Semaeostomeae-Ulmaridae-Tiburoniinae-Tiburonia-T. granrojo

Image(s): NOAA/Monterey Bay Aquarium Research Institute

Moon jellyfish  (Moon jelly, Common jellyfish, Saucer jelly)

Aurelia aurita (Semaeostomeae - Ulmaridae), the Moon jellyfish, often lives in large groups in the sea. You can easily identify them by their four moons’ in the middle. These are the reproductive organs. Males have white and females have pink moons’.

Moon jellyfish have short tentacles along the edge of the bell and four short arms situated around the mouth for catching food. The tentacles of the moon jellyfish are poisonous for small marine animals but people are not affected by the toxin since it does not penetrate the skin. 

Aurelia aurita is a cosmopolitan species, found near the coast, in mostly warm and tropical waters.

Reference: [1]

Photo credit: ©Marten Hansson

Locality: Limhamn, Malmö, Sweden

Brownbanded Moon Jelly - Aurelia limbata

An extraordinary photo of the scyphomedusa (moon jelly) Aurelia limbata (Semaeostomeae - Ulmaridae), an epipelagic species which occurs in arctic waters. The umbrella diameter of this species may vary from 16 to 40 cm.

Molecular analyses have demonstrated that all currently recognized morphospecies of Aurelia are polyphyletic, and that A. limbata includes at least two molecular species.

References: [1

Photo credit: ©Alexander Semenov | Locality: Sea of Okhotsk - Western Pacific (2014)

Moon jelly / ミズクラゲ

Aurelia aurita


Aurelia aurita
Thingies that often appear in large amounts as the warmer season approaches.

Animalia Cnidaria Scyphozoa Semaeostomeae Ulmaridae
動物界 刺胞動物門 鉢虫綱 旗口クラゲ目 ミズクラゲ科

Aquaworld Oarai, Ibaraki, Japan.

Fried egg jellyfish / サムクラゲ

Phacellophora camtschatica

Fried egg jellyfish
It is distributed in cold water of North Pacific.


Animalia Cnidaria Scyphozoa Semaeostomeae Ulmaridae
動物界 刺胞動物門 鉢虫綱 旗口クラゲ目 ミズクラゲ科

The photo taken at Aquaworld Oarai, Ibaraki, Japan.