#periphylla sp.

[donuts4evry1]

oh god I can't stop giggling,,

so like, Atollidae (the family of Atolla Jellyfish) is called "ヒラタカムリクラゲ科" in Japanese (translating to "Flat Crown Jellyfish" in English- very literal). This is a little weird, since the jellyfish in the family are known as "Purple Crown Jellyfish"

meanwhile, the family Periphyllidae is known simply as "クロカムリクラゲ科," or just "Black Crown Jellyfish"

which is funny considering that the jellyfish in this family are also known as "Black Crown Jellyfish" (I suspect the family is simply named after the common name of the animal, haha)

I'm not sure why I find it so funny tbh 🤔🤔, the fact that they decide to be literal with the family Atollidae while sticking to the common name with the family Periphyllidae is just a little weird to me ig?

When it comes to the common names, the naming conventions are eerily similar ("Purple Crown Jellyfish" and "Black Crown Jellyfish"), so ig the family names not reflecting this is kind of funny

[the-jellydex]

Ended up doing a taxonomy thing but I'm not sure if I'll ever properly use it for a post... anyways here's Class scyphozoa for you:

* Subject to change depending on individual species

Order Coronatae: ("Crown")

Tentacles, Lappets, Rhopalia, Mouth, Coronal Groove, Bell

Tentacles typically help up like a spiders'

Usually has 8 ball-like gonads under the bell

Suborder Discomedusae:

Order Semaeostomeae: ("Flag Mouth")

Bell, Oral Arms, Rhopalia, Tentacles

Frilly/ribbon-like oral arms

Order Rhizostomeae: ("Root Mouth")

Bell, Oral Arms, Rhopalia, Filaments

Broccoli-like oral arms

Filaments + Zooxanthallae optional

[the-jellydex]

Hi!! I was just looking through your blog and I enjoy all your jelly related content, so I was just walking through to see what I could add on ^-^ (not related to like, what constitutes as a "jellyfish" because I tried to ramble about that in a reblog and I failed to keep it on track or concise lol)

Anyways- I absolutely AGREE with you- our own lifecycle doesn't exactly fit perfectly with a lot of animals outside of mammalia (and to be honest, it gets even more nebulous when you consider animals outside of chordata, and those that are far, far away from our own physiology)

Jellyfish aren't exactly very "normal," even for our standards of "animal." They utilize a nerve-net, and are radially symmetrical (as opposed to bilaterally symmetrical), contain the weirdest and most confusing form of colonial organism known to science, and consistently break the boundaries of ontogeny and injury by reversing their life cycle and having borderline alien regenerative properties.

The typical (Scyphozoan, Aurelia sp.) jellyfish life cycle looks like this:

Broadcast spawning, eggs are fertilized with sperm

Eggs brood in oral arms until hatched

Planula wriggle around all silly-like until they they find something hard

Planula develop into Polyps (Scyphistoma)

Polyps basically vibe until conditions are right, and turn into strobila (develop into jellyfish :>)

Strobila basically divide themselves into ephyra connected vertically- from bell top to mini manus.

Then they liberate themselves into what we know as ephyra

Ephyra develop into adults ^-^, and then the cycle repeats!

Unless it decides to forsake all that, and reverse it because of stress lol.

I've seen polyps compared to cherry trees, actually ^-^, because they kind of are like fruiting plants. Polyps don't necessarily die or disintegrate after each bout of strobilation, after all (they live year round and reproduce continually, haha). I think if you were to compare multiple life cycles of jellyfish, planula would probably be the most consistent stage, haha.

Speaking of that, though, I think it's important to mention said life cycles of jellyfish, so I'll just list some examples off:

Box jellyfish polyps don't typically produce jellyfish continually, instead the polyps metamorphosize directly into box jellies (sometimes leaving behind residue, sometimes not). Most species, with a few exceptions, do not strobilate.

Some scyphozoan jellies don't produce polyps, staying pelagic for their entire lives (such as the Pelagia noctiluca- nightlight jellyfish, known as the "Open Sea Jellyfish" in japanese and the Periphylla periphylla- or helmet jellyfish). They have planula, but they metamorphosize directly into ephyra.

Hydrozoans also start out as a planula, but the planula grows into a colony of zooids (with different functions), rather than a singular polyp. The Obelia sp. will birth baby medusae (in the exact words of Lisa-Ann Gerswhin) out of a special polyp (similar to how most Crown jellies will come out of a "cup" structure, rather than a stack of coins like most polyp-creating species). However, most hydrozoan medusae simply bud off jellyfish straight from the body.

I think in terms of jellyfish life cycle, I like to think of ephyra as "jellyfish babies," but that's just because ephyras invoke the same emotions for me as a human baby would (THEY'RE SO CUTE I WOULD ABSOLUTELY CARRY AROUND AN ALBUM OF EPHYRA PICTURES)

But... if I were to accurately compare a jellyfish life cycle to something we know... I'd compare it to the life cycle of a fruit. I know most of the fruit's life cycle hinges on the tree form, but like... it does take into account the complexity of the polyp stage more than our limiting human life cycle does, haha.

A planula is no more of a human baby than an apple seed is (or perhaps should I say a tree sprout? Or the entire tree?)

Anyways... wow, I did not mean to ramble so much- that's my bad, haha ;w;! Thanks for giving me the inspiration to ramble so much about jellyfish life cycles, though- that seems to be all I can talk about nowadays.

i think about how my teacher (who specializes in marine inverts) wanted to help her friend's kid with his hw, which was asking about the babies of animals (ex: dog and puppy), and one of the q's was about jellies. my teacher told him to write planula because y'know, basically jelly eggs. then the kid got the paper back and apparently the right answer was ephyra because "it's a miniature of the adult". my teacher proceeded to have a crisis over the definition of "baby". thought the jelly enthusiast would like this one

Omg. I hate the definition of “baby” so much because it changes for every animal. And with animals with full on life cycles, I would consider planula the baby. Ffs they’re called the “larvae”. I think that’s more than enough of a reason to be called the baby.

Tl;dr: i personally agree with your teacher’s answer, because the planula is a “larvae” type cycle

[djgblogger-blog]

Videos unlock secrets of jellyfish as deep-sea killers

http://bit.ly/2BIhQTQ Video footage of a Gonatus squid feeding on a bathylagid fish. © of MBARI Scientists have for the first time captured extensive visual documentation of predation events that underpin deep-sea food webs. The research, which relies on hundreds of video observations captured over nearly three decades by deep-diving remotely operated vehicles run by the Monterey Bay Aquarium Research Institute (MBARI), reveals the importance of deep-sea jellies in these ecosystems as major predators and sources of sustenance. Until now, our understanding of food webs in the deep ocean have been limited by what species can be captured by net and whose bodies can survive a journey to the surface. That meant soft-bodied, gelatinous animals like jellyfish have been greatly underrepresented using traditional surveying techniques. MBARI’s approach enabled researchers Anela Choy, Steven Haddock, and Bruce Robison to capture deep-sea predators in the act of feeding, offering new insight into predator-prey relationships at depths up to nearly 4,000 meters (13,000 feet) off the California coast. “This direct approach has never been used systematically before,” Robison said in a statement. “Unlike other methods, it involves no guesswork and provides very precise information about who eats whom in the deep sea.” ROV frame grabs of pelagic predators and their prey from Choy et al (2017). (a) Gonatus squid feeding on a bathylagid fish (Bathylagidae). (b) Periphylla periphylla, the helmet jellyfish, feeding on a gonatid squid (Gonatidae), with a small narcomedusa (Aegina sp.) also captured. Images © MBARI; caption adapted from Choy et al (2017). The…

[donuts4evry1]

サムクラゲ Samukurage (Phacellophora camtschatica, egg yolk jelly)

ムラサキカムリクラゲ Murasaki kamurikurage (Atolla sp., atolla jelly)

クロカムリクラゲ Kuro kamurikurage (Periphylla sp., periphylla/helmet jelly)

These three are jellyfish names in japanese but. for the life of me. I do not understand the meaning 😭😭...