“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. 


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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

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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. 

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Fried egg jellyfish / サムクラゲ

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Phacellophora camtschatica

Fried egg jellyfish
It is distributed in cold water of North Pacific. サムクラゲ

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.

Deepstaria engimatica

…is an unusual species of deep sea Ulamarid jellyfish that is typically found in Antarctic and near-Antarctic seas. However, D .engimatica has also been spotted in waters near the United Kingdom, at depths of 829 to 1830 meters. D. engimatica has a very thin and wide bell (60cm/23in) and lacks prominent tentacles. Instead of using tentacles to capture its prey D. engimatica engulfs its prey within its sheet-like bell which is lined with a web of vein-like channels which distribute nutrients throughout its body.


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Image: MBARI

The other week, after the Cascade Creature video was going viral on a large scale, and I made a post about it.

Which you can read here.

The original article I cited from the Daily Mail here, pretty much hit the nail on the head, with the questioning whether this ‘mysterious’ creature could be nothing more than a member of the Ulmaridae family. Specifically, this 'Cascade Creature’ is a confirmed Deepstaria enigmatica, as one of you thankfully informed me of last night. You can read more about the rare sighting, and much more rare filming of this deep sea creature here. It was filmed about 5000 feet below the ocean’s surface by an unmanned sub.

For those of you unfamiliar with this larger than life jellyfish, here’s a bit of a summary:

“..most specimens reported colorless but deep brown exumbrella and stomach lining a paler brown recorded once. ”. “Gastrovascular canals fine, somewhat irregular-edged, forming reticulate network across most of bell,” [x]

This 'reticulate network across most of the bell’ is the questionable hexagonal patterns seen on the skin, as seen in the image below.

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Image source.

Our observations of both species of Deepstaria suggest that they usually hang  motionless with the umbrella open…It seems probable to us that medusae in this genus are large ambush predators in the meso- and bathypelagic environment…we speculate that the feeding behaviour might be as follows. The medusae usually hang vertically and motionless with the bell open; occasional peristaltic contractions probably enable them to swim slowly, at least enough to retard sinking. Because the area of the subumbrella is so large, upward-swimming prey occasionally would swim into it. Once prey enter the large subumbrellar chamber, the contact stimulates rapid contraction of the coronal muscle, pursing the umbrella shut and trapping the prey. As the prey attempts to escape, it contacts nematocysts on the subumbrella, being repeatedly stung until weakened. It may additionally become covered with mucus and further immobilized. Then peristalsis and ciliary movement could transport the prey towards the mouth where the oral arms could grasp and engulf it…’Bagging’ prey in this way is not known in other medusae.” [x]

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

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Aurelia aurita

暖かくなると、よく大量発生するやつです。 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.

Aurelia labiata

…is a species of “Moon Jellyfish” (Aurelia spp.) which is known to inhabit the northern Pacific Ocean, ranging from the eastern coast of Japan to the coast of California. Like other jellyfish A. labiata is predatory, using its stinging nematocysts to dispatch small passing invertebrates. A. labiata is very similar to its more common relative A. aurita, and will even occasionally occur in the swarms of A. aurita. However, A. labiata is known to be larger and has a dark brown margin, and well branched subumbrellar canals (canals on the underside of the bell)


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Image: Spacebirdy