siphonophora

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so this little marine critter is the famous siphonophore (NOT A JELLYFISH) Portuguese Man O’ War

such a cute baby alien, This Physalia physalis was stranded at Olivencia beach, Bahia - Brazil, scaring misunderstood people who didnt appreciate her beauty

A Siphonophore  is any of various transparent, often subtly colored marine hydrozoans of the order Siphonophora, consisting of a floating or swimming colony of polyp-like and medusa-like individuals.

Portuguese man-of-war tentacles

The Portuguese man-of-war, Physalia physalis (Siphonophorae - Physaliidae) stands out for its beauty, its deadly effectiveness, and its composition. This is not a jellyfish, but a siphonophore, which takes form and function through the aggregation and physiologic integration of numerous individual zooids, each small and specialized, scarcely capable of life on its own. It is the organization of zooids into polyps that enables the man-of-war to float, feed, reproduce, and sting.

The Portuguese man-of-war is found in the Pacific and Atlantic oceans and consists of a floating colony composed of several types of polypoid individuals attached to a free-floating stem. It has very long tentacles (as long as 30 m), has a large float containing nitrogen and carbon monoxide, and has up to 750 000 nematocysts on each of its 40 tentacles. 

Envenomation by Portuguese man-of-war stings may cause fatalities due to respiratory failure and hypotension. Physalia physalis toxins cause hemolysis, mast cell degranulation, vasodilation, and conduction disturbances.

References: [1] - [2] - [3]

Photo credit: ©Alvaro Migotto | Locality: CEBIMar, University of São Paulo, Brazil (2006)

Made with Flickr

The siphonophoreLilyopsis fluoracantha sp. nov. (A) Whole animal in approximately lateral view. The nectophore drawn on the left is pointing slightly out of the page, and the one on the right is pointing into the page; (B) lateral view of a bract and cormidial bell from the bract’s right side. Spur and gastrozooid are shown only for orientation, and do not accurately represent their positions; © upper view of the bract. Note that the bract comes to sit on the dorsal side of the stem. Abbreviations: anterior (An); posterior (Po); bracteal left (BrL); bracteal right (BrR); somatocyst (so); hydroecium (hy, fine dashed line); pedicular canal (pc); right lateral canal (rlc); left lateral canal (llc); upper radial canal (uc); lower radial canal (loc); red pigment spot (rp); marginal tubercule (tu); bract (br); stem (st); cormidial bell (cb); spur (sp); gastrozooid (gz); longitudinal bracteal canal (lnc); lateral bracteal canal (lac); upper bracteal canal (ubc); anterior hydroecial canal (ah); posterior hydroecial canal (ph).

Haddock, SHD, CW Dunn, and PR Pugh (2005) A reexamination of siphonophore terminology and morphology, applied to the description of two new prayine species with remarkable bio-optical properties. J. Mar. Biol. Assoc. U.K. 85:695-707. doi:10.1017/S0025315405011616 (pdf)

Victorian glass models: Portuguese man-of-war | ©National Museum Wales 

An intricate antique glass model of a Portuguese Man-of-War. The ‘float’ is about 55mm wide by 90mm long. Total height: 240mm. There are about two hundred tentacles made of thin coloured glass, supported and attached by fine copper wires.

This art work was created during the late 19th century, by Leopola Blaschka (1822-1895) and his son Rudolf (1857-1929), who produced beautifully detailed glass models of bizarre sea creatures for natural history museums and aquaria all over the world.

Reference: [1]

Made with Flickr

“Diagrams of siphonophore structure. The anterior end is up unless otherwise noted. The stem can be divided into two regions, the nectosome (which bears the nectophores that propel the entire colony) and the siphosome (which bears all other zooids). Scale bars are approximate. (a) A cystonect, Rhizophysa eysenhardti, scale bar = 2 cm (adapted from Kawamura, 1910). Cystonects have a pneumatophore and a siphosome, but no nectosome. (b) Agalma elegans, scale bar = 2 cm (adapted from Totton, 1954). This species has traditionally been placed in the Physonectae, a grade taxon that includes species with a nectosome (except Athorybia), a siphosome, and a pneumatophore. © A calycophoran, Rosacea flaccida, scale bar = 1 cm (adapted from Biggs et al., 1978). Calycophorans have a nectosome and a siphosome, but no pneumatophore. (d) Lateral view of a portion of siphosomal stem from the physonect Agalma okeni (adapted from Bigelow, 1911) showing some zooids in detail, scale bar = 2 mm. The figured region is part of a series that repeats, with only slight differences, along the entire length of the siphosome. Lateral view (e) and view from the lower surface (f) of a detached nectophore of Halistemma rubrum, scale bar = 5 mm. Nectophores aremedusae that are specialized for propulsion, and contraction causes water to exit from ostium, which faces to the left in these figures. The nectosac (subumbrella) is indicated by stippling. Nourishment is provided from the stem by a series of canals, which sometimes include the descending pallial canal (DPC). The point of attachment (PA) to the stem is also shown. B, bract; GA, gastrozooid; GD, gonodendron (a compound reproductive structure consisting of gonophores, palpons, and special nectophores that propel detached gonodendra but not the entire colony); GO, gonophore; N, nectophore; P, palpon; Pn, pneumatophore; T, tentacle (of the gastrozooid)”

Dunn, CW, PR Pugh, and SHD Haddock (2005) Molecular phylogenetics of the Siphonophora (Cnidaria), with implications for the evolution of functional specialization. Systematic Biology 54:916-935. doi:10.1080/10635150500354837 (pdf)

Physalia physalis, bluebottle or Portuguese Man O’ War by tanetahi on Flickr.

Physalia physalis, bluebottle or Portuguese Man O’ War

On the ocean-ward beach of Bribie Island, north of Brisbane in southeast Queensland. Despite dozens of them being washed up on the surf, there were children playing in the water.

They aren’t a true jellyfish, but a siphonophore, a colonial organism, and the venom is different to jellyfish venom. Vinegar makes it worse, the best treatment is hot salt water which denatures the venom

Apolemia uvaria

…a species of Apolemiid Siphonophore that can be found worldwide, but is most common in the Mediterranean, North-East Atlantic, and areas around Australia and New Zealand. Although A. uvaria is sometimes called a jellyfish it is actually a type of colonial hydrozoan, which consists of many polyps living together in a ‘colony’. Like other siphonophores Apolemia uvaria is a predator and will feed on pelagic zooplankton which are dispatched with stinging tentacles. The polyps in A. uvaria colonies are specialized to preform different tasks, most of the colony consists of stinging tentacles with a gas float and swimming bells at the front. 

Classification

Animalia-Cnidaria-Hydrozoa-Siphonophorae-Physonectae-Aoplemiidae-Apolemia-A. uvaria

Image: Seascapeza

would you believe me if i told you that the last time i had a quad OC was like, 2011
so this is L.A.W (Lennox, Abhner, Wyngate; Lennox is the blue AI, Abhner is the bot, and Wingate is the orange AI). it’s basically the robotic equivalent of a siphonophora. Abhner is an Arcanist prototype that never saw mass production, instead he was used as a test bot for AI. Abhner ended up getting permanently stuck with Lennox and Wyngate after they refused to split up and leave him; after that point, together it was known as L.A.W. L.A.W lives pretty peacefully, and only really attacks if it feels threatened. It’s front legs and head are replaceable, but it’s yet to find any. 

small airhorn noise i’m p happy w/ this design. might tweak Lennox and Wyngate later.