Posts tagged jellyfish
Posts tagged jellyfish
Periphylla periphylla, the helmet jellyfish.
Despite this jellyfish’s ability to produce phosphorescence, other forms of light are toxic to it. For this reason, helmet jellies usually only move up in the water column at night in search of their planktonic food. Unlike most other cnidarians, P. periphylla does not have an anchored larval stage; rather, it remains pelagic throughout its entire lifecycle.
I was skeptical when I first read the ‘other forms of light are toxic’ line, but whoa, their own pigments that give them their coloration can really turn lethal when exposed to light of certain intensity (phototoxicity? photodegradation? so it was a bit like inverse melanin?)
Fascinating stuff. Read more here
Chrysaora hysoscella, the Compass Jellyfish, by Gaynor Rosier. North Atlantic to Mediterranean.
Do you know that Palau’s Jellyfish Lake (Ongeim’l Tketau) isn’t the sole place in the world where you can find and swim with swarms of stingless jellyfish pulsing around in a lake?
Then welcome to Kakaban, of East Kalimantan, Indonesia, a saltwater lake that’s probably an uplifted atoll. The jellies are from the genus Mastigias, some others are from genus Aurelia and Cassiopeia, which is the upside-down jellyfish. Cassiopeia (species ornata) can be found littering the bottom of the lake:
Why those two lakes have stingless jellies? I say it’s convergent evolution at work (which curiously employs the same genus, and hence very similar product taxa).
Check out our latest wallpaper for your desktop, mobile phone, or Facebook page: the Indonesian sea nettle!
The bane of local bathers and fishermen. No idea on the taxonomic identity, could be Sanderia malayensis or maybe just plain ol’ Chrysaora.
In the light of recent, mysterious video of
eldritch abomination from the abyssgelatinous veil like object in the deep sea, here’s a fine digital illustration of strange jellyfish Deepstaria enigmatica (top) and siphonophore Bathyphysa grimaldii (bottom). Artist unknown.
I will wear it as a hat.
Uric the Oddball already beat you to it.
We’re organizing the first-ever live Jelly Chat! Join us Tuesday, June 26 at noon (PDT) here on Facebook, or on Twitter at #jellychat. We’ll take your questions and devote an hour just to jellies. We welcome your questions in advance (Spanish, too)!Learn more about our special exhibition, “The Jellies Experience.”
Turritopsis nutricula, a certain species of jellyfish has been deemed immortal by scientists who have observed its ability to, when in crisis, revert its cells to their earliest form and grow anew. That means that these tiny creatures potentially have infinite lives.
Wait, wait, that’s not Turritopsis nutricula, that’s a scyphozoan jellyfish from genus Chrysaora, aka Sea Nettle.
T. nutricula looks more modest and is a hydrozoan:
The scyphomedusa, Deepstaria, is certainly odd, with its bag-like appearance, and bell that can open more than a meter wide. Speculation on the identity of a mystery blob has become a YouTube sensation, sparking heated and entertaining debates over its identity. That video of Deepstaria reticulum (described by Larson, et al., in 1988) looks especially unusual because the medusa is being blown around by the thrusters of the Remotely Operated Vehicle, and eventually turns completely inside-out.
In this video, we show some more natural-looking specimens of Deepstaria reticulum and Deepstaria enigmatica, along with other related species from the deep sea. More information about the video and excerpts from scientific papers about Deepstaria can be found at the Deep-Sea News blog:
Here’s the video in question, just in case you were wondering. I agree with one of the commenters, it’s probably Deepstaria enigmatica getting swept by the current.
What surprises me is that the creature does not seem to possess visible motility/contraction that’s usually observed in other jellyfish. It’s just like a plastic bag, drifting through the sea. Probably wanting to start again.